Author: "Armelle Ouali" / Topic: 0104 chemical sciences - Searchworks@Jio Institute Digital Library Search Results

Your search keyword '"Armelle Ouali"' showing total 37 results

Start Over Author "Armelle Ouali" Topic 0104 chemical sciences

37 results on '"Armelle Ouali"'

1. Synthesis and characterization of tetrathiol-substituted double-decker or ladder silsesquioxane nano-cores

Author: Armelle Ouali, Masafumi Unno, Nobuhiro Takeda, Yujia Liu, Mana Kigure, Riho Okawa, Gunma University, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: Materials science, biology, 02 engineering and technology, 010402 general chemistry, 021001 nanoscience & nanotechnology, biology.organism_classification, 01 natural sciences, Silsesquioxane, 0104 chemical sciences, Characterization (materials science), Inorganic Chemistry, chemistry.chemical_compound, chemistry, Nano, Polymer chemistry, [CHIM]Chemical Sciences, Tetra, 0210 nano-technology, Double decker, ComputingMilieux_MISCELLANEOUS
Abstract: Tetra(3-mercaptopropyl)-silsesquioxanes with double-decker (DDSQ) or ladder nano-cores were easily prepared from the corresponding tetraallyl derivatives through fast and convenient thiol-ene reactions. An additional tetrathiol-DDSQ with more flexible arms was also synthesized in high yield from the corresponding tetrachloro-DDSQ derivative. The three novel tetrathiol silsesquioxanes described represent versatile building blocks for the preparation of hybrid organic-inorganic materials.
Published: 2021
Full Text: View/download PDF

2. Synthesis, Characterization, and Reaction of Divinyl‐substituted Laddersiloxanes

Author: Yujia Liu, Aimi Endo, Peiyao Zhang, Akira Takizawa, Nobuhiro Takeda, Armelle Ouali, Masafumi Unno, Gunma University, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), and Institute for Molecular & Cellular Regulation
Subjects: [CHIM.ORGA]Chemical Sciences/Organic chemistry, 02 engineering and technology, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 0210 nano-technology, 01 natural sciences, 0104 chemical sciences, Electronic, Optical and Magnetic Materials
Abstract: International audience; superior properties. Among them, laddersiloxanes (ladder-type silsesquioxanes with defined structure) are less exploredbecause step-by-step synthesis is usually necessary. In order to investigate the properties of laddersiloxanes, and applythese compounds as monomer precursors to high function materials, we prepared laddersiloxanes with reactive vinylgroups.Methods The target compounds were obtained in a two-step reaction fromcommercially available alkoxysilanes, and total yieldswere 73–93 %. Three product stereoisomers were fully investigated by spectroscopic methods and structures were determined.Results As an extension of our previous research on constructing new laddersiloxanes, we will describe here the synthesis,characterization, and functionalization of novel divinyl-substituted laddersiloxanes. Further transformation of all productsproceeded smoothly, and extended laddersiloxanes were obtained by hydrosilylation. One isomer was isolated and the structurewas determined unequivocally by X-ray analysis.Conclusions The laddersiloxanes described here have two reactive vinyl groups at each end of the molecule. Various reactionsincluding hydrosilylation, polymerization, or olefin metathesis are possible, thus these compounds can be potential monomers forhighly functionalized materials.
Published: 2021
Full Text: View/download PDF

3. Terpyridine–Ru Complexes Noncovalently Supported on Cobalt Magnetic Nanoparticles for Nitroarene Transfer Hydrogenation

Author: Olivier Dautel, Armelle Ouali, Houria Asri, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: Materials science, π-stacking interactions, 010405 organic chemistry, Magnetic nanoparticles (MNPs), chemistry.chemical_element, 010402 general chemistry, Transfer hydrogenation, 01 natural sciences, Combinatorial chemistry, 0104 chemical sciences, Catalysis, Pyrene-tagged catalysts, chemistry.chemical_compound, Metrics & More Article Recommendations magnetic nanoparticles (MNPs), -stacking interactions, chemistry, nitroarene transfer hydrogenation, parasitic diseases, 2-propanol, Magnetic nanoparticles, [CHIM]Chemical Sciences, General Materials Science, Terpyridine, Cobalt
Abstract: International audience; This work reports the preparation and characterization of active and recyclable supported catalysts involving molecular Ru−terpyridine complexes and their ability to promote the transfer hydrogenation of nitroarenes in 2-propanol. The system proposed is based on the design of original pyrene-tagged terpyridine ligands, either monomeric "1 tpy " (one pyrene tag for one terpyridine) or multivalent "5 tpy " (one pyrene tag for five terpyridines), able to interact with the graphene surface of commercially available cobalt magnetic nanoparticles (MNPs) through π-stacking interactions. The existence of noncovalent interactions between the pyrene-tagged terpyridines and the MNP surface at 20°C was assessed by fluorescence spectroscopy for the first time in 2-propanol, an organic medium. Interestingly, 1 tpy and 5 tpy were shown to be released upon temperature increase (80°C) while the association was restored upon temperature decrease (20°C). The reversibility of this phenomenon enabled to reach high activities in nitroarene transfer hydrogenation for the corresponding Ru complexes (catalytic species are free in refluxing 2propanol) and high recyclabilities (noncovalent interactions are restored upon cooling). It is noteworthy that the multivalent ligand 5 tpy displaying, as expected, the higher terpyridine loading (0.15 mmol of tpy/g of MNPs vs 0.03 mmol for 1 tpy) also gave rise to the Ru catalyst with the best recyclability (8 consecutive cycles with no loss of activity against 5 cycles for the catalyst based on the monomeric ligand 1 tpy). In both cases, the ruthenium leaching was found to be low and the expected aniline met the requirements of the pharmaceutical industry (
Published: 2020
Full Text: View/download PDF

4. Conjugated Copolymers That Shouldn't Be

Author: Zejun Sun, Aimi Endo, Yujia Liu, John Kieffer, Siriporn Jungsuttiwong, Joseph C. Furgal, Nuttapon Yodsin, Masafumi Unno, Richard M. Laine, Daniel Hashemi, Ramin Ansari, Jun Guan, Shahrea Mahbub, Armelle Ouali, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), and Gunma University
Subjects: Biphenyl, chemistry.chemical_classification, [CHIM.ORGA]Chemical Sciences/Organic chemistry, 010405 organic chemistry, General Chemistry, Polymer, [CHIM.CATA]Chemical Sciences/Catalysis, [CHIM.MATE]Chemical Sciences/Material chemistry, General Medicine, Conjugated system, 010402 general chemistry, 01 natural sciences, Catalysis, Silsesquioxane, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Terphenyl, Siloxane, Polymer chemistry, Copolymer, Thiophene, ComputingMilieux_MISCELLANEOUS
Abstract: Multiple studies have explored using cage silsesquioxanes (SQs) as backbone elements in hybrid polymers motivated by their well-defined structures, physical and mechanical properties. As part of this general exploration, we reported unexpected photophysical properties of copolymers derived from divinyl double decker (DD) SQs, [vinyl(Me)Si(O 0.5 ) 2 ][PhSiO 1.5 ] 8 [(O 0.5 ) 2 Si(Me)vinyl] (vinylDDvinyl). These copolymers exhibit strong emission red-shifts from model compounds and implying unconventional conjugation, despite vinyl(Me)Si(O-) 2 siloxane bridges. In an effort to identify minimum SQ structures that do/do not offer extended conjugation; we explored Heck catalyzed co-polymerization of vinyl-ladder(LL)-vinyl compounds, vinyl(Me/Ph)Si(O 0.5 ) 2 [PhSiO 1.5 ] 4 (O 0.5 ) 2 Si(Me/Ph)vinyl, with Br-Ar-Br where Br-Ar-Br = 1,4-dibromobenzene, 4,4'-dibromo-1,1'-biphenyl, 4,4''-dibromo- p -terphenyl, 4,4'-dibromo- trans -stilbene, 2,7-dibromo-9,9-dimethyl-9H-fluorene, 2,5-dibromothiophene, 5,5'-dibromo-2,2'-bithiophene and 2,5-dibromo-thieno[3,2- b ]thiophene. Most surprising, the resulting oligomers show 30-60 nm emission red-shifts beyond those seen with vinylDDvinyl analogs despite lacking a true cage . Further evidence for unconventional conjugation includes apparent integer charge transfer (ICT) between LL-co-thiophene, bithiophene and thienothiophene with 10 mol% F 4 TCNQ, suggesting potential as p-type doped organic/inorganic semiconductors. Brominating DD/LL-co-phenyl polymer vinyl groups eliminates emission red-shifts. Zn debromination thereafter restores vinyl groups and emission red-shifts but brominated phenyls remain providing potential access to families of "hairy" conjugated SQ polymers.
Published: 2020
Full Text: View/download PDF

5. Styryl-Functionalized Cage Silsesquioxanes as Nanoblocks for 3-D Assembly

Author: Armelle Ouali, Carole Carcel, Mathilde Laird, John R. Bartlett, Masafumi Unno, Michel Wong Chi Man, Dan Dumitrescu, Arie van der Lee, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2), Institut Européen des membranes (IEM), Université de Montpellier (UM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), University of the Sunshine Coast (USC), Gunma University, Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM), XRD2 beamline, Elettra - Sincrotrone Trieste S.C.p.A., Strada Statale 14- km 163,5 in AREA Science Park, 34149 Basovizza, Trieste, Italy, Western Sydney University, and Department of Chemistry and Chemical Biology, Graduate School of Science and Technology, Gunma University, Kiryu 376-8515, Gunma, Japan
Subjects: Silicon, Silsesquioxanes, 010405 organic chemistry, Chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Crystal structure, Organic Chemistry, chemistry.chemical_element, [CHIM.MATE]Chemical Sciences/Material chemistry, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Inorganic Chemistry, Polymer chemistry, Moiety, Surface modification, Physical and Theoretical Chemistry, Cage, Functionalization, ComputingMilieux_MISCELLANEOUS, Vinyl
Abstract: International audience; Herein we report the synthesis of a new family of styryl-functionalized polyhedral oligomeric silsesquioxanes (Tn, where n = 8, 10, and 12), in which the organic moiety is linked to all n vertices of the Tn cages via the phenyl ring rather than the vinyl group. In contrast to earlier studies in which the styryl group is linked to the cage via the vinyl moiety, our approach ensures that the vinyl moiety is less sterically hindered and available for postfunctionalization. The functional Tn cages have been characterized by a range of techniques, including single crystal X-ray diffraction, multinuclear solution NMR (1H, 13C, and 29Si), MALDI-MS, and FTIR. The solid-state structure of the T8 compound exhibited two nonequivalent Si8O12 cage atoms, which has not been previously reported in the functionalized T8 system, although all cage atoms in the corresponding T10 and T12 systems were equivalent. In contrast, multinuclear solution NMR data indicated that all cages in the T8 system were equivalent in solution, suggesting that the nonequivalent cage geometries arise in the solid state to optimize the packing of the functionalized cages. These compounds have significant potential for future use in the production of 3D cross-linked polymer networks.
Published: 2020
Full Text: View/download PDF

6. π-Stacking Interactions of Graphene-Coated Cobalt Magnetic Nanoparticles with Pyrene-Tagged Dendritic Poly(Vinylidene Fluoride)

Author: Vincent Collière, Anne-Marie Caminade, Enrique Folgado, Marc Guerre, Christian Bijani, Kathleen I. Moineau-Chane Ching, Bruno Ameduri, Nidhal Mimouni, Vincent Ladmiral, Armelle Ouali, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: π-stacking, magnetic nanoparticles, Dendrimers, Materials science, Stacking, chemistry.chemical_element, 02 engineering and technology, 010402 general chemistry, 01 natural sciences, Fluorescence spectroscopy, law.invention, chemistry.chemical_compound, law, Dendrimer, Moiety, Pyrenes, Graphene, [CHIM.MATE]Chemical Sciences/Material chemistry, General Chemistry, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Poly(vinylidenefluoride), [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Chemical engineering, Pyrene, Magnetic nanoparticles, 0210 nano-technology, Cobalt
Abstract: International audience; This study investigates the non-covalent coating of cobalt magnetic nanoparticles (MNPs) involving a graphene surface with pyrene-tagged dendritic poly(vinylidene fluoride) (PVDF). Dendrimers bearing a pyrene moiety were selected to play the role of spacers between the graphene surface of the MNPs and the PVDF chains, the pyrene unit being expected to interact with the surface of the MNPs. The pyrene-tagged dendritic spacer 11 decorated with ten acetylenic units was prepared and fully characterized. Azido-functionalized PVDF chains were then grafted onto each branch of the dendrimer using Huisgen’s [3 + 2] cycloaddition reaction. Next, the association of the resulting pyrene-tagged dendritic PVDF 13 with commercially available Co/C MNPs by π -stacking interactions was studied by fluorescence spectroscopy. Evaluated were the stability of the π -stacking interactions when the temperature increased and the reversibility of the process when the temperature de- creased. Also, hybrid MNPs were prepared from pyrene-tagged dendrimers decorated either with acetylenic functions ( 11 ) or with PVDF branches ( 13 ), and they were characterized by transmission electron microscopy and comparative elemental analysis was carried out with naked MNPs.
Published: 2018
Full Text: View/download PDF

7. Heterogeneous Pd/POSS Nanocatalysts for C-C Cross-Coupling Reactions

Author: Preeyanuch Sangtrirutnugul, Armelle Ouali, Michel Wong Chi Man, Vuthichai Ervithayasuporn, Vetiga Somjit, Mahidol University [Bangkok], Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), and Functional POSS as nanocatalysts
Subjects: Heterogeneous catalysis, Silsesquioxane, 010405 organic chemistry, Nanoparticle, chemistry.chemical_element, Silica, General Chemistry, 010402 general chemistry, 01 natural sciences, Nanomaterial-based catalyst, Coupling reaction, 0104 chemical sciences, Catalysis, chemistry.chemical_compound, chemistry, Polymer chemistry, Nucleophilic substitution, [CHIM]Chemical Sciences, Palladium, POSS
Abstract: International audience; An insoluble solid support of N−heterocyclic imidazolium-functionalized cage-like silsesquioxane (SQ); Bim-SQ, was synthesized by nucleophilic substitution of octakis(3-chloropropyl)octasilsesquioxane with an excess bis-(imidazol-1-yl)methane and investigated as a new organic-inorganic hybrid support. In the presence of Bim-SQ, Pd(II) from [PdCl4]2− can be stabilized via both electrostatic interactions and imidazole-N-coordination, giving an amorphous material of Pd(II)@Bim-SQ. Subsequent in situ reduction of Pd(II)@Bim-SQ during Suzuki−Miyaura cross-coupling reactions afforded monodispersed Pd nanoparticles (2.33 ± 1.50 nm) stablized on Bim-SQ support, PdNp@Bim-SQ with Pd loading up to 14% w/w. Catalytic studies revealed that the pre-catalyst Pd(II)@Bim-SQ was active heterogeneous catalyst for Suzuki−Miyaura cross-coupling reactions, having the maximum TOFs of 5400 h−1 under mild conditions and in aqueous ethanol medium. Furthermore, PdNp@Bim-SQ was also shown to be an efficient catalyst for Heck reactions. Simple catalyst recovery and reusability of PdNp@Bim-SQ for at least 5 catalytic cycles without loss of activity were also demonstrated.
Published: 2018
Full Text: View/download PDF

8. The Pivotal Role of Catalysis in France: Selected Examples of Recent Advances and Future Prospects

Author: Daniel Duprez, Yves Schuurman, Françoise Maugé, Axel Löfberg, Pascal Fongarland, Franck Dumeignil, Christophe Geantet, Armelle Ouali, Helene Olivier-Bourbigou, Pascal Granger, Nathalie Tanchoux, Catherine Pinel, Anne-Cécile Roger, Denis Uzio, Céline Chizallet, François Jérôme, Pascale Massiani, Franck Launay, IFP Energies nouvelles (IFPEN), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Génie des Procédés Catalytiques (LGPC), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Supérieure de Chimie Physique Électronique de Lyon (CPE)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-C'Durable (CDURABLE), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-Catalyse Hétérogène pour la Transition Energétique (CATREN), Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Laboratoire catalyse et spectrochimie (LCS), Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), IRCELYON-Ingéniérie, du matériau au réacteur (ING), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Université de Poitiers-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, École Supérieure Chimie Physique Électronique de Lyon-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), and Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Engineering, 010405 organic chemistry, business.industry, Organic Chemistry, Nanotechnology, [CHIM.CATA]Chemical Sciences/Catalysis, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Catalysis, 0104 chemical sciences, Inorganic Chemistry, Engineering ethics, Physical and Theoretical Chemistry, business, ComputingMilieux_MISCELLANEOUS
Abstract: The review describes the most significant recent results achieved in France in the field of heterogeneous catalysis over the last 10 years. It focusses on the research carried out in the French academic laboratories, often in close collaboration with some industrial partners.
Published: 2017
Full Text: View/download PDF

9. Synthesis and Characterization of Functionalizable Silsesquioxanes with Ladder-type Structures

Author: Nobuhiro Takeda, Masafumi Unno, Yujia Liu, Armelle Ouali, Kazuki Onodera, Gunma University, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: Inorganic Chemistry, chemistry.chemical_compound, 010405 organic chemistry, Chemistry, Hydrosilylation, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Organic Chemistry, Polymer chemistry, Physical and Theoretical Chemistry, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Characterization (materials science)
Abstract: International audience; Novel tetravinyl-and tetraallyl-substituted laddersiloxanes were synthesized and characterized. It was shown that peripheral olefins could successfully undergo hydrosilylation quantitatively, possibly leading to tetrahalide ladder structures. All reported functional laddersiloxanes LS (LS-Vinyl4, LS-Allyl4, LS-Cl4 and LS-I4) thus constitute promising building blocks for more complex inorganic-organic hybrid materials.
Published: 2019
Full Text: View/download PDF

10. Cyclotriphosphazene, an old compound applied to the synthesis of smart dendrimers with tailored properties

Author: Armelle Ouali, Kathleen Moineau Chane-Ching, Cyrille Rebout, Jean-Pierre Majoral, Aurélien Hameau, Anne-Marie Caminade, Cédric-Olivier Turrin, Béatrice Delavaux-Nicot, Régis Laurent, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: Dendrimers, ICPC-21, 010405 organic chemistry, Chemistry, General Chemical Engineering, Nanotechnology, General Chemistry, 010402 general chemistry, 01 natural sciences, Chemical synthesis, Phosphorus chemistry, 0104 chemical sciences, Dendrimer, [CHIM.COOR]Chemical Sciences/Coordination chemistry
Abstract: The versatile reactivity of hexachlorocyclotriphosphazene (N3P3Cl6) has been developed for the synthesis of specifically engineered dendrimers. Dendrimers are hyperbranched macromolecules built by concentric layers constituted of associated monomeric units. Many of the properties of dendrimers depend on the type of their surface (terminal) functions, which are generally all identical. For some specific purposes, it is desirable to have one function that is different at the level of the core. Hexachlorocyclotriphosphazene offers the possibility to differentiate the reactivity of one (or more) Cl from the others, for producing specifically engineered dendritic tools. These specific reactions on N3P3Cl6 have produced highly dense dendrimers, Janus dendrimers (two faces), tools for functionalizing materials, with uses as catalysts, as chemical sensors, for trapping CO2, for the culture of cells, or for imaging biological events. These properties will be emphasized in this review.
Published: 2016
Full Text: View/download PDF

11. Synthesis, Characterization, and Functionalization of Tetrafunctional Double-Decker Siloxanes

Author: Yujia Liu, Nobuhiro Takeda, Masafumi Unno, Armelle Ouali, Gunma University, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: 010405 organic chemistry, Chemistry, Hydrosilylation, [CHIM.INOR]Chemical Sciences/Inorganic chemistry, 010402 general chemistry, 01 natural sciences, Combinatorial chemistry, 0104 chemical sciences, Characterization (materials science), Inorganic Chemistry, chemistry.chemical_compound, Surface modification, [CHIM]Chemical Sciences, Physical and Theoretical Chemistry, Hybrid material, Double decker
Abstract: International audience; Novel tetravinyl- and tetraallyl-substituted closed double-decker siloxanes (DDSQs) were synthesized and characterized, and their structures were elucidated by X-ray crystallographic analysis. Moreover, it was shown that peripheral olefins could successfully undergo hydrosilylation quantitatively. Such tetrafunctionalizable DDSQs (DDSQ-Vinyl4 and DDSQ-Allyl4) thus constitute promising building blocks for more complex inorganic–organic hybrid materials.SynopsisNovel tetravinyl- and tetraallyl-substituted closed double-decker siloxanes (DDSQs) were synthesized and peripheral olefins shown to successfully undergo hydrosilylation quantitatively. Such tetrafunctionalizable DDSQs thus constitute promising building blocks for more complex inorganic−organic hybrid materials.
Published: 2019
Full Text: View/download PDF

12. Cover Picture: The Pivotal Role of Catalysis in France: Selected Examples of Recent Advances and Future Prospects. (ChemCatChem 12/2017)

Author: Catherine Pinel, Yves Schuurman, Pascal Fongarland, Pascale Massiani, Axel Löfberg, Françoise Maugé, Armelle Ouali, Daniel Duprez, Franck Launay, Anne-Cécile Roger, Christophe Geantet, Franck Dumeignil, Denis Uzio, Helene Olivier-Bourbigou, Céline Chizallet, François Jérôme, Nathalie Tanchoux, Pascal Granger, IFP Energies nouvelles (IFPEN), Laboratoire de catalyse de Lille - UMR 8010 (LCL), Université de Lille, Sciences et Technologies-Centrale Lille-Centre National de la Recherche Scientifique (CNRS), Institut de recherches sur la catalyse et l'environnement de Lyon (IRCELYON), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Institut de recherches sur la catalyse (IRC), Centre National de la Recherche Scientifique (CNRS), Systèmes interfaciaux à l'echelle nanometrique (SIEN), Université Pierre et Marie Curie - Paris 6 (UPMC)-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Hétérochimie Moléculaire et Macromoléculaire (HMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Laboratoire des Matériaux, Surfaces et Procédés pour la Catalyse (LMSPC), Institut de chimie et procédés pour l'énergie, l'environnement et la santé (ICPEES), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC), Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Matériaux et Nanosciences Grand-Est (MNGE), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), and Université de Poitiers-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010405 organic chemistry, Chemistry, Organic Chemistry, Nanotechnology, [CHIM.CATA]Chemical Sciences/Catalysis, 010402 general chemistry, 01 natural sciences, Catalysis, 0104 chemical sciences, Inorganic Chemistry, Ab initio quantum chemistry methods, Cover (algebra), Physical and Theoretical Chemistry, ComputingMilieux_MISCELLANEOUS
Abstract: International audience
Published: 2017
Full Text: View/download PDF

13. BF2 complexes of 1,3-diketones on the surface of phosphorus dendrimers: synthesis and study of the photoluminescence properties

Author: Aurélien Hameau, Anne-Marie Caminade, Mireille Blanchard-Desce, Olivier Mongin, Cédric Rouxel, Armelle Ouali, Jean-Pierre Majoral, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut des Sciences Chimiques de Rennes (ISCR), Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées, Institut des Sciences Moléculaires (ISM), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Université Sciences et Technologies - Bordeaux 1-Université Montesquieu - Bordeaux 4-Institut de Chimie du CNRS (INC), CNRS, Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Toulouse (UT), Université Montesquieu - Bordeaux 4-Université Sciences et Technologies - Bordeaux 1 (UB)-École Nationale Supérieure de Chimie et de Physique de Bordeaux (ENSCPB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées - Rennes (INSA Rennes), and Institut National des Sciences Appliquées (INSA)-Université de Rennes (UNIV-RENNES)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Diketone, Fluorophore, Photoluminescence, 010405 organic chemistry, Organic Chemistry, phosphorhydrazone, dioxaborine, General Chemistry, diketone, 010402 general chemistry, Photochemistry, 01 natural sciences, Fluorescence, Catalysis, 0104 chemical sciences, 3. Good health, dendrimers, chemistry.chemical_compound, Monomer, chemistry, Absorption band, Dendrimer, [CHIM]Chemical Sciences, Hypsochromic shift, fluorescence
Abstract: International audience; Difluoroboron complexes of monomeric and dimeric diketones and of generations 0-4 of phosphorus dendrimers ended by diketone ligands are synthesized and characterized. Their photoluminescence properties are measured. All compounds exhibit an intense absorption band in the near UV region. Both model dimers and dendrimers show a marked hypsochromic shift of this absorption band compared with the monomeric difluoroboron complex. The fluorescence of the dioxaborine complex subunit in the multichromophoric dendritic architectures is quenched compared with the emission of the isolated monomeric fluorophore, presumably due to interactions between the terminal groups of dendrimers.
Published: 2017
Full Text: View/download PDF

14. Catalysis Within Dendrimers

Author: Régis Laurent, Armelle Ouali, Anne-Marie Caminade, Jean-Pierre Majoral, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Poli, R.
Subjects: 010405 organic chemistry, Chemistry, Asymmetric hydrogenation, Nanotechnology, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, Covalent bond, Dendrimer, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Catalytic efficiency, Metal nanoparticles, ComputingMilieux_MISCELLANEOUS, Macromolecule
Abstract: Dendrimers are hyperbranched macromolecules, synthesized step by step (generation after generation) in an iterative fashion, which structure is reminiscent to that of the branches of trees. Most of their properties are due to their terminal functions, which can be easily modified at will to fulfill the desired properties. In particular, many types of catalytic entities have been used as terminal groups of dendrimers. In some cases, a dendritic effect , that is the enhancement of the catalytic properties when a catalyst is linked to a dendrimer, has been observed. It is also generally possible to recover and reuse the dendritic catalysts. The internal structure of dendrimers can also play a key-role, as it manages cavities which can accommodate the catalytic entities, and enable the substrates to interact with them. Catalytic sites included inside the structure of dendrimers are rare, excepted if they constitute the core of dendrimers (or of dendrons, which are dendritic wedges). Effect of the confinement on the catalysis outcome is generally the main aim of these works. Another type of dendritic catalytic entities taking profit of the internal structure concerns metallic nanoparticles used as core of dendrimers. In this chapter, we will gather information about catalytic entities included inside dendrimers, either covalently linked, or noncovalently entrapped, and on their syntheses. The main types of reactions studied, the role of the generation (size) of the dendrimers, their recovery and reuse, and in general the effect of the confinement inside the dendritic structures on the catalytic efficiency will be discussed.
Published: 2017
Full Text: View/download PDF

15. Grignard reagents and Copper

Author: Marc Taillefer and Armelle Ouali
Subjects: chemistry, 010405 organic chemistry, Reagent, General Physics and Astronomy, Organic chemistry, chemistry.chemical_element, General Materials Science, General Chemistry, 010402 general chemistry, 01 natural sciences, Copper, 0104 chemical sciences
Published: 2016
Full Text: View/download PDF

16. Well-defined poly(vinylidene fluoride) (PVDF) based-dendrimers synthesized by click chemistry: enhanced crystallinity of PVDF and increased hydrophobicity of PVDF films

Author: Marc Guerre, Bruno Ameduri, Armelle Ouali, Anne-Marie Caminade, Vincent Ladmiral, Christian Bijani, Enrique Folgado, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: Materials science, Polymers and Plastics, Organic Chemistry, Bioengineering, 02 engineering and technology, Fluorine-19 NMR, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, Biochemistry, 0104 chemical sciences, Contact angle, chemistry.chemical_compound, Crystallinity, [CHIM.POLY]Chemical Sciences/Polymers, chemistry, Dendrimer, Polymer chemistry, Click chemistry, [CHIM]Chemical Sciences, Well-defined, 0210 nano-technology, High-resolution transmission electron microscopy, Fluoride, ComputingMilieux_MISCELLANEOUS
Abstract: This study reports the preparation by click chemistry of a novel fluorinated dendrimer bearing PVDF branches and its characterization by several analytical methods including 1H, 13C, 31P and 19F NMR, diffusional NMR, SEC, DLS, ATG, DSC and HRTEM. As remarkable properties, this dendritic PVDF displayed crystallinity (HRTEM highlighted crystalline disc-like zones of ca. 5 nm) and a much higher hydrophobicity than both its precursors with the water contact angle (WCA) reaching 108°.
Published: 2016
Full Text: View/download PDF

17. Coordination chemistry with phosphorus dendrimers. Applications as catalysts, for materials, and in biology

Author: Jean-Pierre Majoral, Anne-Marie Caminade, Cédric-Olivier Turrin, Régis Laurent, Armelle Ouali, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: chemistry.chemical_classification, 010405 organic chemistry, Nanotechnology, 010402 general chemistry, Heterogeneous catalysis, 01 natural sciences, 0104 chemical sciences, Coordination complex, Catalysis, Inorganic Chemistry, chemistry, Homogeneous, Dendrimer, Materials Chemistry, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Physical and Theoretical Chemistry, Hybrid material, Metal nanoparticles, Macromolecule
Abstract: International audience; Dendrimers are hyperbranched macromolecules having a perfectly defined and multifunctionalized structure, constituted of branches emanating radially from a central core. The structure of dendrimers is particularly modular, and can incorporate in different parts coordination complexes. In this review, we will present the interplay between dendrimers and coordination chemistry in three main fields: catalysis, materials, and biology. Most of the examples will be taken from the work done with phosphorus-containing dendrimers, but the pioneering work carried out with other dendrimers will be also presented. One of the major improvements that metallodendrimers have afforded concerning catalysis is their easy recovery and reuse, bridging the gap between homogeneous and heterogeneous catalysis. Another major improvement concerns the “dendritic effect” which can afford impressive outcomes concerning the increase of yield and of enantioselectivity, together with a decrease of the leaching of metals, and consequently of waste. Dendrimers can be used also for the synthesis and stabilization of metallic nanoparticles, for the modification of metallic surfaces at the nanometric scale, and for the synthesis of mesoscopically ordered hybrid materials. Finally metallodendrimers have high potency against cancerous cell lines, and they appear to operate via a different mechanism of action compared with native metallodrugs, opening new avenues for the search of improved anti-cancer agents.
Published: 2016
Full Text: View/download PDF

18. Solventless synthesis of Ru(0) composites stabilized with polyphosphorhydrazone (PPH) dendrons and their use in catalysis

Author: Rocío Redón, Anne-Marie Caminade, Armelle Ouali, Nidia G. García-Peña, Cédric-Olivier Turrin, Departamento de Tecnociencias,Centro de Ciencias Aplicadas y Desarrollo Tecnologico, Universidad Nacional Autonoma de Mexico, Universidad Nacional Autónoma de México (UNAM), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)
Subjects: chemistry.chemical_classification, General Chemical Engineering, chemistry.chemical_element, Nanoparticle, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, Photochemistry, 01 natural sciences, 0104 chemical sciences, Ruthenium, Catalysis, Styrene, Sodium borohydride, chemistry.chemical_compound, chemistry, Dendrimer, [CHIM.COOR]Chemical Sciences/Coordination chemistry, 0210 nano-technology, Ruthenium chloride, Alkyl
Abstract: International audience; Ruthenium nanoparticles (NPs) are prepared by milling under air ruthenium chloride (RuCl3), sodium borohydride (NaBH4) and a polyphosphorhydrazone (PPH) dendron (generation 0 to 2) having an alkyl chain at the focal point and triarylphosphines on the surface. The resulting NPs have a diameter in the 2 to 3 nm range and they are stable upon storage in solution or as powders. They can efficiently catalyze hydrogenation of styrene. The interaction between the dendrons and the NPs is studied, and the influence of the alkyl chain length and dendron generation is also discussed.
Published: 2016
Full Text: View/download PDF

19. Nitrogen Ligands in Copper-Catalyzed Arylation of Phenols: Structure/Activity Relationships and Applications

Author: Armelle Ouali, Jean François Spindler, Marc Taillefer, Anny Jutand, Hétérochimie Moléculaire et Macromoléculaire (HMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Rhodia Organique Fine Centre de Recherches de Lyon (CRL), RHODIA, Processus d'Activation Sélective par Transfert d'Energie Uni-électronique ou Radiatif (UMR 8640) (PASTEUR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Département de Chimie - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS Paris), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris)
Subjects: Denticity, 010405 organic chemistry, Ligand, Imine, Rational design, General Medicine, [CHIM.CATA]Chemical Sciences/Catalysis, General Chemistry, 010402 general chemistry, 01 natural sciences, Combinatorial chemistry, 0104 chemical sciences, chemistry.chemical_compound, chemistry, Nucleophile, Pyridine, Organic chemistry, Chelation, Binding site, ComputingMilieux_MISCELLANEOUS
Abstract: In spite of the importance of ligand/ copper-catalyzed arylations of nucleophiles in organic chemistry, the structural and electronic features that make a ligand efficient in these reactions have not been determined until now. In this work, several bidentate ligands involving pyridine and/or imine nitrogen binding sites such as our lead ligand 1 have been synthesized, and tested in phenol arylations with a view to highlight relationships between the structure of the chelates and their efficacy. This study allowed us to more precisely define the role of each type of N-binding site during the catalytic process, and to discover new efficient ligands. Among them, the iminopyridine 6a, which is cheap and easy-to-prepare in high yield, is very attractive for industrial applications. Some examples of its field of application are presented here. In the future, the development of this work could allow a more rational design of efficient ligands in arylation reactions, without resorting to classical ligand screening.
Published: 2007
Full Text: View/download PDF

20. The key role of the scaffold on the efficiency of dendrimer nanodrugs

Author: Armelle Ouali, Alexandrine Maraval, Cédric-Olivier Turrin, Anne-Marie Caminade, Rémy Poupot, Jean-Pierre Majoral, Valeri I. Kovalenko, Marek Maly, Matteo Garzoni, Mary Poupot, Giovanni M. Pavan, Séverine Fruchon, Victor Furer, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Physiopathologie Toulouse Purpan (CPTP), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches en Cancérologie de Toulouse (CRCT), Université Fédérale Toulouse Midi-Pyrénées, Department of Innovative Technologies, University of Applied Sciences and Arts of Southern Switzerland, Scuola universitaria professionale della Svizzera italiana [Manno] (SUPSI), Kazan State Architect and Civil Engineering University, University of Kazan, A.E. Arbuzov Institute of Organic and Physical Chemistry (IOPC), Kazan Scientific Centre of the Russian Academy of Sciences, Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre de Physiopathologie Toulouse Purpan ex IFR 30 et IFR 150 (CPTP), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Gulli, Marie-Hélène, Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), and Scuola universitaria professionale della Svizzera italiana = University of Applied Sciences and Arts of Southern Switzerland [Manno] (SUPSI)
Subjects: Dendrimers, Scaffold, General Physics and Astronomy, Biocompatible Materials, Nanotechnology, 02 engineering and technology, Molecular Dynamics Simulation, Polypropylenes, 010402 general chemistry, 01 natural sciences, Monocytes, Article, General Biochemistry, Genetics and Molecular Biology, chemistry.chemical_compound, Molecular dynamics, Dendrimer, Humans, Polylysine, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Aza Compounds, Multidisciplinary, Bone Density Conservation Agents, Diphosphonates, Molecular Structure, General Chemistry, Silanes, [CHIM.COOR] Chemical Sciences/Coordination chemistry, Flow Cytometry, 021001 nanoscience & nanotechnology, Biocompatible material, 0104 chemical sciences, chemistry, Biophysics, Nanoparticles, 0210 nano-technology, Macromolecule
Abstract: Dendrimers are well-defined macromolecules whose highly branched structure is reminiscent of many natural structures, such as trees, dendritic cells, neurons or the networks of kidneys and lungs. Nature has privileged such branched structures for increasing the efficiency of exchanges with the external medium; thus, the whole structure is of pivotal importance for these natural networks. On the contrary, it is generally believed that the properties of dendrimers are essentially related to their terminal groups, and that the internal structure plays the minor role of an ‘innocent' scaffold. Here we show that such an assertion is misleading, using convergent information from biological data (human monocytes activation) and all-atom molecular dynamics simulations on seven families of dendrimers (13 compounds) that we have synthesized, possessing identical terminal groups, but different internal structures. This work demonstrates that the scaffold of nanodrugs strongly influences their properties, somewhat reminiscent of the backbone of proteins., The biological properties of dendrimers are thought to be largely dependent on the chemical nature of their surface. Here, the authors show that the internal scaffold of dendritic nanodrugs strongly influences their bioactivity, based on convergent information from biology and computation results.
Published: 2015
Full Text: View/download PDF

21. Phosphorus dendrimers as supports of transition metal catalysts

Author: Jean-Pierre Majoral, Armelle Ouali, Régis Laurent, Anne-Marie Caminade, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: 010405 organic chemistry, Phosphorus, chemistry.chemical_element, Homogeneous catalysis, 010402 general chemistry, Photochemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, Inorganic Chemistry, chemistry.chemical_compound, Monomer, Organic reaction, chemistry, Transition metal, Dendrimer, Polymer chemistry, Materials Chemistry, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Physical and Theoretical Chemistry, Macromolecule
Abstract: International audience; Dendrimer are hyperbranched macromolecules, which can be used as support of catalytic entities. This review focusses on polyphosphorhydrazone (PPH) dendrimers, bearing as terminal groups, transition metal complexes of 3d elements (Cu, Sc) and 4d elements (Pd, Ru, Rh). These complexes have been used as catalysts for various organic reactions, in particular C–C couplings. Most of these dendritic complexes can be recovered and re-used several times (up to 12 successive runs with the same efficiency). In several cases, a dendritic (or dendrimer) effect is observed, i.e., an increased efficiency and/or enantioselectivity when comparing a monomeric catalyst with increasing generations of the dendrimers, using in all cases the same number of catalytic entities.
Published: 2015
Full Text: View/download PDF

22. The dendritic effect illustrated with phosphorus dendrimers

Author: Anne-Marie Caminade, Régis Laurent, Jean-Pierre Majoral, Cédric-Olivier Turrin, Armelle Ouali, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: chemistry.chemical_compound, chemistry, 010405 organic chemistry, Dendrimer, Functional group, Polymer chemistry, Biophysics, [CHIM.COOR]Chemical Sciences/Coordination chemistry, General Chemistry, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences
Abstract: International audience; The dendritic (or dendrimer) effect is observed when a functional group behaves differently when it is alone or linked to a dendrimer; its properties can even vary depending on the generation of the dendrimers. The dendritic effect can be observed with any type of dendrimer, and for any type of property, even if it has been most generally tracked in catalysis and biology, and to a lesser extent in the field of materials. This review is mainly oriented towards the various types of dendritic effects observed with polyphosphorhydrazone dendrimers, even if many examples obtained with other types of dendrimers are given.
Published: 2015
Full Text: View/download PDF

23. Efficient Iron/Copper Co-Catalyzed Arylation of Nitrogen Nucleophiles

Author: Ning Xia, Marc Taillefer, and Armelle Ouali
Subjects: Alkylation, Nitrogen, Iron, chemistry.chemical_element, Halide, 010402 general chemistry, Hydrocarbons, Aromatic, 01 natural sciences, Medicinal chemistry, Catalysis, chemistry.chemical_compound, Nucleophile, Polymer chemistry, Organic chemistry, Bimetallic strip, Iron copper, Molecular Structure, 010405 organic chemistry, Aryl, Stereoisomerism, General Medicine, General Chemistry, Copper, 0104 chemical sciences, 3. Good health, chemistry
Abstract: In summary, we have presented here a first and original example of a cooperative bimetallic catalysis [Fe]-[Cu] allowing the N-arylation of various nitrogen nucleophiles from differently substituted aryl halides (X = I, Br, Cl)
Published: 2007
Full Text: View/download PDF

24. Efficient and eco-compatible transition metal-free Oppenauer-type oxidation of alcohols

Author: Marc Taillefer, Anne-Marie Caminade, Jorge Ballester, Jean-Pierre Majoral, Armelle Ouali, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Ketone, Sodium, chemistry.chemical_element, Alcohol, 010402 general chemistry, 01 natural sciences, Catalysis, chemistry.chemical_compound, Transition metal, Oppenauer, Oxidation, Benzophenone, Organic chemistry, chemistry.chemical_classification, 010405 organic chemistry, Process Chemistry and Technology, Sodium tert-butoxide, General Chemistry, 0104 chemical sciences, chemistry, Alcohol oxidation, [CHIM.CHEM]Chemical Sciences/Cheminformatics
Abstract: International audience; Catalytic amounts of cheap, non-toxic, easy-to-handle and non-sensitive sodium tert-butoxide are able to promote the dehydrogenative oxidation of a wide array of secondary alcohols using inexpensive benzophenone as the H-acceptor. The corresponding ketones, highly important intermediates and targets throughout life and material sciences, are very selectively obtained under mild conditions
Published: 2014
Full Text: View/download PDF

25. Pyrene-tagged dendritic catalysts noncovalently grafted onto magnetic Co/C nanoparticles: an efficient and recyclable system for drug synthesis

Author: Anne-Marie Caminade, Oliver Reiser, Michel Keller, Armelle Ouali, Jean-Pierre Majoral, Vincent Collière, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), and Universität Regensburg (UR)
Subjects: magnetic nanoparticles, Phosphines, Nanoparticle, 010402 general chemistry, 01 natural sciences, Catalysis, dendrimers, chemistry.chemical_compound, Polymer chemistry, Recycling, Magnetite Nanoparticles, catalyst recycling, Pyrenes, 010405 organic chemistry, General Chemistry, Cobalt, General Medicine, palladium, Carbon, 0104 chemical sciences, 3. Good health, Drug synthesis, chemistry, Chemical engineering, Pharmaceutical Preparations, Pyrene, Suzuki coupling
Abstract: 1521-3773
Published: 2013
Full Text: View/download PDF

26. Efficient and recyclable rare earth-based catalysts for Friedel–Crafts acylations under microwave heating: dendrimers show the way

Author: Jean-Pierre Majoral, Arnaud Perrier, Michel Keller, Anne-Marie Caminade, Armelle Ouali, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: 010405 organic chemistry, Chemistry, Ligand, Rare earth, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Pollution, 0104 chemical sciences, Catalysis, Acylation, chemistry.chemical_compound, Microwave heating, Dendrimer, Environmental Chemistry, Organic chemistry, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Terpyridine, Friedel–Crafts reaction
Abstract: International audience; The catalytic system involving Sc(OTf )3 and a dendritic terpyridine ligand is able to promote the Friedel–Crafts acylation of a wide range of aromatics under microwave irradiation. The expected products are obtained in high yields after short reaction times and the nano-sized catalyst can be recovered and successfully used in 12 consecutive runs.
Published: 2013
Full Text: View/download PDF

27. Organocatalysis with dendrimers

Author: Jean-Pierre Majoral, Anne-Marie Caminade, Armelle Ouali, Michel Keller, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Toulouse III - Paul Sabatier (UT3), and Université Fédérale Toulouse Midi-Pyrénées
Subjects: Aldehydes, Dendrimers, Esterification, 010405 organic chemistry, Chemistry, General Chemistry, Bond formation, 010402 general chemistry, 01 natural sciences, Catalysis, 0104 chemical sciences, Metal, Metals, visual_art, Dendrimer, Organocatalysis, visual_art.visual_art_medium, Organic chemistry, [CHIM.COOR]Chemical Sciences/Coordination chemistry, Oxidation-Reduction, Large size, Bond cleavage
Abstract: International audience; This review gives an overview of the use of dendrimers and dendrons as organocatalysts, i.e. as catalysts in the absence of any metal. A large variety of dendrimeric structures have already been used for such a purpose, varying in size (generation), type and location (core or surface) of the organocatalytic entities, and overall chemical composition. The main types of reactions catalyzed concern bond formation (in particular C–C bonds), bond cleavage (in particular of esters), reductions and oxidations. In many cases, good to excellent enantioselectivities have been observed, in some cases associated with a positive dendritic effect (better properties when the generation of the dendrimer increases). Due to their large size compared to products, the dendrimeric organocatalysts can be often recovered and reused several times.
Published: 2012
Full Text: View/download PDF

28. Synthesis of Dendritic β-Diketones and Their Application in Copper-Catalyzed Diaryl Ether Formation

Author: Mykhailo Ianchuk, Marc Taillefer, Sonia Ladeira, Jean-Pierre Majoral, Anne-Marie Caminade, Armelle Ouali, Michel Keller, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Fédérale Toulouse Midi-Pyrénées, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: Dendrimers, chemistry.chemical_element, 010402 general chemistry, 01 natural sciences, Catalysis, chemistry.chemical_compound, Phenols, Dendrimer, Polymer chemistry, Organic chemistry, Physical and Theoretical Chemistry, Diketone ligands, Diketone, 010405 organic chemistry, Ligand, Aryl, Organic Chemistry, Phosphorus, Arylation, Copper, 0104 chemical sciences, Monomer, chemistry, [CHIM.CHEM]Chemical Sciences/Cheminformatics, Macromolecule
Abstract: International audience; Phosphorus-based dendrimers decorated with β-diketones were prepared and fully characterized. These macromolecules, which are the first examples of multivalent dendrimeric β-diketones, were tested as ligands for copper in O-arylations of 3,5-dimethylphenol by aryl bromides. Although no dendrimer effect was observed, we were able to highlight a very efficient catalytic system that involved a monomeric β-diketone as the ligand. The proposed conditions are very competitive in terms of catalyst and base loading as the C-O coupling can be efficiently performed by using low amounts of copper precursor (1 mol-% instead of 5-10 mol-%), diketone (4 mol-% instead of 25-80 mol-%), and base (1.2 equiv. of cesium carbonate instead of 2 or more). Moreover, the absence of the dendrimer effect is explained by the decomposition of the dendrimer under the reaction conditions, which led to the release of the peripheral diketone moieties.
Published: 2012
Full Text: View/download PDF

29. NaOH-Promoted Hydrogen Transfer: Does NaOH or Traces of Transition Metals Catalyze the Reaction?

Author: Anne-Marie Caminade, Jean-Pierre Majoral, Armelle Ouali, Marc Taillefer, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC)
Subjects: inorganic chemicals, ketones, Inorganic chemistry, Alcohol, Homogeneous catalysis, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Catalysis, alcohols, Inorganic Chemistry, chemistry.chemical_compound, Transition metal, hydrogen transfer, Organic chemistry, bases, Physical and Theoretical Chemistry, Inert gas, 010405 organic chemistry, Organic Chemistry, Hydrogen transfer, homogeneous catalysis, 0104 chemical sciences, chemistry, Reagent, Anhydrous, [CHIM.CHEM]Chemical Sciences/Cheminformatics
Abstract: International audience; NaOH is revealed as an excellent catalyst for the hydrogen transfer of a wide range of aromatic and aliphatic ketones, which can be converted in high yields into the corresponding alcohols. The method is simple, cheap, uses a nontoxic and easy-to-handle catalyst, and does not require strictly anhydrous reagents, an inert atmosphere, transition metals, or any additional ligands. The pathway of this reaction is still debatable: is it a Meerwein-Ponndorf-Verley-like process or are traces of transition metals present in commercial NaOH responsible for the activity? Possible mechanisms of this surprising reaction are discussed.
Published: 2009
Full Text: View/download PDF

30. Copper-Catalyzed Arylation of Nucleophiles by Using Butadienylphosphines as Ligands: Mechanistic Insight

Author: Armelle Ouali, Marc Taillefer, Fouad Ouazzani, Hamid Kaddouri, Virginie Vicente, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), LCOA, FST Fès (LCOA FST), and Centre National de la Recherche Scientifique (CNRS)
Subjects: Models, Molecular, Reaction mechanism, Phosphines, chemistry.chemical_element, Homogeneous catalysis, Photochemistry, Crystallography, X-Ray, Ligands, 010402 general chemistry, 01 natural sciences, Catalysis, Nucleophile, arylation, ComputingMilieux_MISCELLANEOUS, Molecular Structure, Chemistry, Iodobenzenes, 010405 organic chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Stereoisomerism, General Chemistry, General Medicine, Combinatorial chemistry, Copper, homogeneous catalysis, 0104 chemical sciences, P ligands, reaction mechanisms, copper, Copper catalyzed, Pyrazoles, Bromobenzenes
Abstract: International audience
Published: 2009
Full Text: View/download PDF

31. Activation of aryl halides by Cu(0)/1,10-phenanthroline: Cu(0) as precursor of Cu(I) catalyst in cross-coupling reactions

Author: Marc Taillefer, Mounir Mansour, Anny Jutand, Roberto Giacovazzi, Armelle Ouali, Processus d'Activation Sélective par Transfert d'Energie Uni-électronique ou Radiatif (UMR 8640) (PASTEUR), Université Pierre et Marie Curie - Paris 6 (UPMC)-Département de Chimie - ENS Paris, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut de Chimie de Toulouse (ICT), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)
Subjects: Phenanthroline, Inorganic chemistry, chemistry.chemical_element, Halide, 010402 general chemistry, Electrochemistry, 01 natural sciences, Coupling reaction, Catalysis, chemistry.chemical_compound, Polymer chemistry, Materials Chemistry, Acetonitrile, catalysis, 010405 organic chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Aryl, Metals and Alloys, General Chemistry, Copper, 0104 chemical sciences, 3. Good health, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, chemistry, electrochemistry, copper, Ceramics and Composites
Abstract: International audience; The activation of aryl iodides and bromides by Cu(0)/1,10-phenanthroline in acetonitrile (S) generates Cu(I)(phenanthroline)S2+ which can be a catalyst for cross-coupling reactions.
Published: 2008
Full Text: View/download PDF

32. Thiazolyl Phosphine Ligands for Copper-Catalyzed Arylation and Vinylation of Nucleophiles in Organic and Aqueous Media

Author: Ning Xia, Marc Taillefer, René T. Boeré, Gennady V. Oshovsky, Carine Duhayon, Armelle Ouali, Jean-Pierre Majoral, Maria Zablocka, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Centre of Molecular and Macromolecular Studies, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Department of Chemistry and Biochemistry, Hétérochimie Moléculaire et Macromoléculaire (HMM), and Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)
Subjects: Aqueous solution, Aqueous medium, 010405 organic chemistry, Chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Organic Chemistry, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, Inorganic Chemistry, chemistry.chemical_compound, Nucleophile, Molecule, Organic chemistry, Physical and Theoretical Chemistry, Acetonitrile, Phase-transfer catalyst, Phosphine
Abstract: International audience; A straightforward and efficient synthetic route to thiazolyl phosphines is reported. Moreover, the first application of these molecules in catalysis is described. These phosphines are excellent ligands in the copper-catalyzed arylation and Vinylation of nucleophiles. The reactions could be performed in acetonitrile and Various mixed aqueous/organic solvents and even in pure water in the presence of a phase transfer catalyst. In each case, coupling products are obtained with high yields at very mild temperatures.
Published: 2008
Full Text: View/download PDF

33. Tailored Control and Optimisation of the Number of Phosphonic Acid Termini on Phosphorus-Containing Dendrimers for the Ex-Vivo Activation of Human Monocytes

Author: Alexandrine Maraval, Laurent Griffe, Olivier Rolland, Jean-Pierre Majoral, Mary Poupot, Armelle Ouali, Jean-Jacques Fournié, Cédric-Olivier Turrin, Yannick Coppel, Gérard Bacquet, Anne-Marie Caminade, Rémy Poupot, Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Centre de Physiopathologie de Toulouse-Purpan (INSERM U563 - CNRS UMR1037), CHU Toulouse [Toulouse]-Institut Claudius Regaud-Hôpital Purpan [Toulouse], CHU Toulouse [Toulouse]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de lutte contre le cancer (CLCC)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherches d'Aubervilliers (RHODIA), RHODIA, Institut de Chimie de Toulouse (ICT-FR 2599), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Universitaire de Toulouse (CHU Toulouse)-Institut Claudius Regaud-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre de lutte contre le cancer (CLCC)-Centre National de la Recherche Scientifique (CNRS), Poupot, Mary, Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Centre de lutte contre le cancer (CLCC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Hôpital Purpan [Toulouse], and CHU Toulouse [Toulouse]-CHU Toulouse [Toulouse]-Institut Claudius Regaud
Subjects: Adult, [SDV.MHEP.HEM] Life Sciences [q-bio]/Human health and pathology/Hematology, Dendrimers, Magnetic Resonance Spectroscopy, Stereochemistry, Phosphorus containing, Organophosphonates, Surface loading, Lymphocyte Activation, 010402 general chemistry, 01 natural sciences, Monocytes, Catalysis, chemistry.chemical_compound, Dendrimer, medicine, Humans, Microscopy, Confocal, 010405 organic chemistry, Chemistry, Monocyte, Organic Chemistry, Phosphorus, [SDV.MHEP.HEM]Life Sciences [q-bio]/Human health and pathology/Hematology, General Chemistry, Phosphonate, 0104 chemical sciences, medicine.anatomical_structure, Dense packing, Ex vivo
Abstract: International audience; The syntheses of a series of phosphonic acid-capped dendrimers is described. This collection is based on a unique set of dendritic structural parameters-cyclo(triphosphazene) core, benzylhydrazone branches and phosphonic acid surface-and was designed to study the influence of phosphonate (phosphonic acid) surface loading towards the activation of human monocytes ex vivo. Starting from the versatile hexachloro-cyclo(triphosphazene) N(3)P(3)Cl(6), six first-generation dendrimers were obtained, bearing one to six full branches, that lead to 4, 8, 12, 16, 20 and 24 phosphonate termini, respectively. The surface loading was also explored at the limit of dense packing by means of a first-generation dendrimer having a cyclo(tetraphosphazene) core and bearing 32 termini, and with a first-generation dendrimer based on a AB(2)/CD(5) growing pattern and bearing 60 termini. Human monocyte activation by these dendrimers confirms the requirement of the whole dendritic structure for bioactivity and identifies the dendrimer bearing four branches, thus 16 phosphonate termini, as the most bioactive.
Published: 2008
Full Text: View/download PDF

34. Mild Copper-Catalyzed Vinylation Reactions of Azoles and Phenols with Vinyl Bromides

Author: Brice Renard, Jean-Francis Spindler, Marc Taillefer, Armelle Ouali, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Rhodia Organique Fine Centre de Recherches de Lyon (CRL), RHODIA, and BDI Rhodia
Subjects: Denticity, vinylation, chemistry.chemical_element, Homogeneous catalysis, 010402 general chemistry, 01 natural sciences, Coupling reaction, copper iodide, Catalysis, chemistry.chemical_compound, Organic chemistry, phenol, Phenol, Chelation, Phenols, triazoles, mild temperature conditions, catalysis, vinyl bromides, [CHIM.ORGA]Chemical Sciences/Organic chemistry, 010405 organic chemistry, Chemistry, Aryl, Organic Chemistry, General Chemistry, General Medicine, Copper, Combinatorial chemistry, 0104 chemical sciences, an industrial scale, copper, N- or O-nucleophiles, Copper catalyzed, nitrogen ligands
Abstract: International audience; An efficient and straightforward copper-catalyzed method allowing vinylation of N- or O-nucleophiles with di- or trisubstituted vinyl bromides is reported. The procedure is applicable to a broad range of substrates since N-vinylation of mono-, di- and triazoles as well as O-vinylation of phenol derivatives can be performed by the mean of catalytic amounts of copper iodide and inexpensive nitrogen ligands 3 or 8. In the case of more hindered vinyl bromides, the use of the original bidentate chelator 8 was shown to be more efficient to promote the coupling reactions than our key tetradentate ligand 3. Corresponding N-(1-alkenyl)-azoles and alkenyl aryl ethers are obtained in high yields and selectivities in very mild temperature conditions (35-110 °C for N-vinylation reactions and 50-80 °C for O-vinylation reactions). Moreover, to our knowledge, this method is the first example of a copper-catalyzed vinylation of various azoles. Finally, this protocol, practical at the scale of the laboratory and easily adaptable to an industrial scale, is very competitive compared to the whole of existing methods allowing the syntheses of such compounds.
Published: 2006
Full Text: View/download PDF

35. Mild Conditions for Copper-Catalyzed Coupling Reaction of Phenols and Aryl Iodides and Bromides

Author: Marc Taillefer, Jean-Francis Spindler, Armelle Ouali, Henri-Jean Cristau, Institut Charles Gerhardt Montpellier - Institut de Chimie Moléculaire et des Matériaux de Montpellier (ICGM ICMMM), Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Université Montpellier 1 (UM1)-Université Montpellier 2 - Sciences et Techniques (UM2)-Institut de Chimie du CNRS (INC), Rhodia Organique Fine Centre de Recherches de Lyon (CRL), RHODIA, and BDI Rhodia
Subjects: Base (chemistry), K3PO4, Tripotassium phosphate, chemistry.chemical_element, phenols, diaryl ethers, 010402 general chemistry, 7. Clean energy, 01 natural sciences, Coupling reaction, Catalysis, copper iodide, chemistry.chemical_compound, industrial scale, Organic chemistry, Phenol, Phenols, aryl bromides, chemistry.chemical_classification, catalysis, 010405 organic chemistry, Chemistry, Ligand, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Aryl, Industrial scale, General Medicine, General Chemistry, Combinatorial chemistry, Copper, 0104 chemical sciences, Ullmann, Copper catalyzed
Abstract: International audience; Coupling of phenols and aryl bromides can efficiently be performed by the mean of catalytic amounts of copper iodide and inexpensive ligand 1 (structure given in Table 1). The reaction is applicable to a wide range of substrates and proceed at 60-80 °C, lowest temperatures reported to date for Ullmann-type synthesis of diaryl ethers. Moreover, the use of aryl bromides and inexpensive K3PO4 as base make this method attractive for application at an industrial scale.
Published: 2006
Full Text: View/download PDF

36. Mild and Efficient Copper-Catalyzed Cyanation of Aryl Iodides and Bromides

Author: Henri-Jean Cristau, Armelle Ouali, Marc Taillefer, Jean Francis Spindler, Laboratoire de Chimie Organique, Ecole Nationale Supérieure de Chimie de Montpellier (ENSCM), Rhodia Organique Fine Centre de Recherches de Lyon (CRL), and RHODIA
Subjects: chemistry.chemical_element, Homogeneous catalysis, Cyanation, 010402 general chemistry, Iodine, Medicinal chemistry, 01 natural sciences, Catalysis, chemistry.chemical_compound, Organic chemistry, acetone cyanohydrin, cyanation, Acetone cyanohydrin, 010405 organic chemistry, [CHIM.ORGA]Chemical Sciences/Organic chemistry, Aryl, Organic Chemistry, General Medicine, General Chemistry, Copper, homogeneous catalysis, 0104 chemical sciences, aryl halides, chemistry, copper, Copper catalyzed, Nitro
Abstract: International audience; An efficient copper-catalyzed cyanation of aryl iodides and bromides is reported. Our system combines catalytic amounts of both copper salts and chelating ligands. The latter, which have potential nitrogen- and/or oxygen-binding sites, have never previously been used in this type of reaction. A protocol has been developed that enables the cyanation of aryl bromides through the copper-catalyzed in situ production of the corresponding aryl iodides using catalytic amounts of potassium iodide. Aryl nitriles are obtained in good yields and excellent selectivities in relatively mild conditions (110 °C) compared with the Rosenmund-von Braun cyanation reaction. Furthermore, the reaction is compatible with a wide range of functional groups including nitro and amino substituents. The protocol reported herein involves two main innovations: the use of catalytic amounts of ligands and the use of acetone cyanohydrin as the cyanating agent in copper-mediated cyanation reactions.
Published: 2005
Full Text: View/download PDF

37. Enhanced Catalytic Properties of Copper in O- and N-Arylation and Vinylation Reactions, Using Phosphorus Dendrimers as Ligands

Author: Marc Taillefer, Jean-Pierre Majoral, Anne-Marie Caminade, Régis Laurent, and Armelle Ouali
Subjects: Dendrimers, chemistry.chemical_element, Ligands, 010402 general chemistry, 01 natural sciences, Biochemistry, Catalysis, Styrenes, chemistry.chemical_compound, Colloid and Surface Chemistry, Dendrimer, Pyridine, Organic chemistry, Molecule, heterocyclic compounds, Chelation, Molecular Structure, 010405 organic chemistry, Ligand, Phosphorus, General Chemistry, Combinatorial chemistry, Copper, 0104 chemical sciences, Monomer, chemistry
Abstract: Imino pyridine-capped phosphorus dendrimers were found to strongly enhance the catalytic activity of copper in arylations and vinylations of O- and N-nucleophiles. These reactions could indeed be performed under very mild conditions, often the mildest to date. Interestingly, such performances could not be obtained when using the monomeric imino pyridine chelating ligand alone. To the best of our knowledge, this constitutes a rare example of such a positive dendritic effect in the field of organometallic catalysis.
Published: 2006
Full Text: View/download PDF

Catalog

Books, media, physical & digital resources

See catalog results

Searchworks

Select search scope, currently: Articles Catalog books, media & more in Jio Institute collections Articles journal articles & other e-resources

Search

Search Constraints

Refine your results

Search Limiters

Topic

Publication Year Range

Language

Journal

Database

Publisher

37 results on '"Armelle Ouali"'

Search Results

Catalog

Select search scope, currently: Articles

Catalog

books, media & more in Jio Institute collections

Articles

journal articles & other e-resources