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2. N1-{4-[2-(Methylthio)-1H-imidazol-5-yl]pyridin-2-yl}benzene-1,4-diamine

Author

Ahmed El-Gokha, Francesco Ansideri, Stanislav Andreev, Dieter Schollmeyer, Stefan Laufer, and Pierre Koch

Subjects
pyridinylimidazole, kinase inhibitor, c-Jun N-terminal kinase 3, JNK3, heterocycle, single crystal diffraction, Inorganic chemistry, QD146-197
Abstract

The title compound N1-{4-[2-(methylthio)-1H-imidazol-5-yl]pyridin-2-yl}benzene-1,4-diamine (2) was synthesized via nucleophilic aromatic substitution of 2-chloro-4-[2-(methylthio)-1H-imidazol-5-yl]pyridine (3) and p-phenylenediamine under acidic conditions. The synthesized compound 2 was characterized by 1H-NMR, 13C-NMR, MS HPLC, IR and UV-VIS. Additionally, the structure of 2 was confirmed by single crystal X-ray diffraction. Pyridinylimidazole 2 displays moderate affinity towards the c-Jun N-terminal kinase 3 and shows selectivity versus the closely related p38α mitogen-activated protein kinase.

Published
2019
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3. Design, Synthesis and Biological Evaluation of 7-Chloro-9H-pyrimido[4,5-b]indole-based Glycogen Synthase Kinase-3β Inhibitors

Author

Stanislav Andreev, Tatu Pantsar, Francesco Ansideri, Mark Kudolo, Michael Forster, Dieter Schollmeyer, Stefan A. Laufer, and Pierre Koch

Subjects
Glycogen synthase kinase-3β, 7-chloro-9H-pyrimido[4,5-b]indole, protein kinase, kinase inhibitor, tofacitinib, Organic chemistry, QD241-441
Abstract

Glycogen synthase kinase-3β (GSK-3β) represents a relevant drug target for the treatment of neurodegenerative pathologies including Alzheimer’s disease. We herein report on the optimization of a novel class of GSK-3β inhibitors based on the tofacitinib-derived screen hit 3-((3R,4R)-3-((7-chloro-9H-pyrimido[4,5-b]indol-4-yl)(methyl)amino)-4-methylpiperidin-1-yl)-3-oxopropanenitrile (1). We synthesized a series of 19 novel 7-chloro-9H-pyrimido[4,5-b]indole-based derivatives and studied their structure−activity relationships with focus on the cyanoacetyl piperidine moiety. We unveiled the crucial role of the nitrile group and its importance for the activity of this compound series. A successful rigidization approach afforded 3-(3aRS,7aSR)-(1-(7-chloro-9H-pyrimido[4,5-b]indol-4-yl)octahydro-6H-pyrrolo[2,3-c]pyridin-6-yl)-propanenitrile (24), which displayed an IC50 value of 130 nM on GSK-3β and was further characterized by its metabolic stability. Finally, we disclosed the putative binding modes of the most potent inhibitors within the ATP binding site of GSK-3β by 1 µs molecular dynamics simulations.

Published
2019
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4. 1-(3′,6′-Dihydroxy-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthen]-5-yl)-3-[4-({4-[1-(4-fluorophenyl)-1H-imidazol-5-yl]pyridin-2-yl}amino)phenyl]thiourea methanol monosolvate

Author

Francesco Ansideri, Dieter Schollmeyer, and Pierre Koch

Subjects
crystal structure, fluorescein, thiourea, pyridinylimidazole, Crystallography, QD901-999
Abstract

The title compound, which crystallized as a methanol monosolvate, C41H27FN6O5S·CH3OH, was synthesized as a probe for a fluorescence polarization-based competition binding assay. The isobenzofuran fused-ring system is close to planar and orientated almost perpendicular to the central ring of the xanthene system. The dihedral angle between the benzene rings of the xanthene system is 10.0 (2)°, indicating a butterfly-like orientation. A short intramolecular C—F...π contact [F...π = 3.100 (4) Å and C—F...π = 139.9 (3)°] to the six-membered ring of the isobenzofuran system may influence the molecular conformation. The methanol solvent molecule is disordered over two orientations in a 0.6:0.4 ratio. In the crystal, the components are linked by numerous hydrogen bonds, generating a three-dimensional network.

Published
2016
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5. Discovery and evaluation of enantiopure 9H-pyrimido[4,5‐b]indoles as nanomolar GSK‐3β inhibitors with improved metabolic stability

Author

Stanislav Andreev, Tatu Pantsar, Ahmed El-Gokha, Francesco Ansideri, Mark Kudolo, Débora Bublitz Anton, Giulia Sita, Jenny Romasco, Christian Geibel, Michael Lämmerhofer, Márcia Ines Goettert, Andrea Tarozzi, Stefan A. Laufer, Pierre Koch, Andreev S., Pantsar T., El-gokha A., Ansideri F., Kudolo M., Anton D.B., Sita G., Romasco J., Geibel C., Lammerhofer M., Goettert M.I., Tarozzi A., Laufer S.A., and Koch P.

Subjects
Male, 9H‐pyrimido[4,5‐b] indole, Indoles, 9H-pyrimido[4,5-b]indole, Drug Evaluation, Preclinical, CHO Cells, Molecular Dynamics Simulation, Article, Protein kinase, Cell Line, glycogen synthase kinase-3β, lcsh:Chemistry, Structure-Activity Relationship, Cricetulus, Drug Stability, Glycogen synthase kinase‐3β, Drug Discovery, Animals, Humans, lcsh:QH301-705.5, Protein Kinase Inhibitors, Kinase inhibitor, Glycogen Synthase Kinase 3 beta, lcsh:Biology (General), lcsh:QD1-999, Microsomes, Liver, Female, Metabolic stability
Abstract

Glycogen synthase kinase-3&beta, (GSK-3&beta, ) is a potential target in the field of Alzheimer&rsquo, s disease drug discovery. We recently reported a new class of 9H-pyrimido[4,5-b]indole-based GSK-3&beta, inhibitors, of which 3-(3-((7-chloro-9H-pyrimido[4,5-b]indol-4-yl)(methyl)amino)piperidin-1-yl)propanenitrile (1) demonstrated promising inhibitory potency. However, this compound underwent rapid degradation by human liver microsomes. Starting from 1, we prepared a series of amide-based derivatives and studied their structure&ndash, activity relationships against GSK-3&beta, supported by 1 &micro, s molecular dynamics simulations. The biological potency of this series was substantially enhanced by identifying the eutomer configuration at the stereocenter. Moreover, the introduction of an amide bond proved to be an effective strategy to eliminate the metabolic hotspot. The most potent compounds, (R)-3-(3-((7-chloro-9H-pyrimido[4,5-b]indol-4-yl)(methyl)amino)piperidin-1-yl)-3-oxopropanenitrile ((R)-2) and (R)-1-(3-((7-bromo-9Hpyrimido[4,5-b]indol-4-yl)(methyl)amino)piperidin-1-yl)propan-1-one ((R)-28), exhibited IC50 values of 480 nM and 360 nM, respectively, and displayed improved metabolic stability. Their favorable biological profile is complemented by minimal cytotoxicity and neuroprotective properties.

Published
2020

6. N1-{4-[2-(Methylthio)-1H-imidazol-5-yl]pyridin-2-yl}benzene-1,4-diamine

Author

Stanislav Andreev, Francesco Ansideri, Pierre Koch, Dieter Schollmeyer, Ahmed El-Gokha, and Stefan Laufer

Subjects
kinase inhibitor, 010402 general chemistry, 01 natural sciences, Biochemistry, Medicinal chemistry, High-performance liquid chromatography, chemistry.chemical_compound, Nucleophilic aromatic substitution, Diamine, Pyridine, lcsh:Inorganic chemistry, Physical and Theoretical Chemistry, Protein kinase A, Benzene, single crystal diffraction, JNK3, c-Jun N-terminal kinase 3, 010405 organic chemistry, Organic Chemistry, lcsh:QD146-197, 0104 chemical sciences, chemistry, pyridinylimidazole, Selectivity, Single crystal, heterocycle
Abstract

The title compound N1-{4-[2-(methylthio)-1H-imidazol-5-yl]pyridin-2-yl}benzene-1,4-diamine (2) was synthesized via nucleophilic aromatic substitution of 2-chloro-4-[2-(methylthio)-1H-imidazol-5-yl]pyridine (3) and p-phenylenediamine under acidic conditions. The synthesized compound 2 was characterized by 1H-NMR, 13C-NMR, MS HPLC, IR and UV-VIS. Additionally, the structure of 2 was confirmed by single crystal X-ray diffraction. Pyridinylimidazole 2 displays moderate affinity towards the c-Jun N-terminal kinase 3 and shows selectivity versus the closely related p38α mitogen-activated protein kinase.

Published
2019

7. A Diverse and Versatile Regiospecific Synthesis of Tetrasubstituted Alkylsulfanylimidazoles as p38α Mitogen-Activated Protein Kinase Inhibitors

Author

Koch, Francesco Ansideri, Stanislav Andreev, Annette Kuhn, Wolfgang Albrecht, Stefan Laufer, and Pierre

Subjects
regiospecific synthesis, tetrasubstituted imidazoles, p38α MAP kinase
Abstract

An alternative strategy for the synthesis of 1-aryl- and 1-alkyl-2-methylsulfanyl-4-(4-fluorophenyl)-5-(pyridin-4-yl)imidazoles as potential p38α mitogen-activated protein kinase inhibitors is reported. The regioselective N-substitution of the imidazole ring was achieved by treatment of α-aminoketones with different aryl or alkyl isothiocyanates. In contrast to previously published synthesis routes starting from 2-amino-4-methylpyridine, the presented route is characterized by a higher flexibility and a lower number of steps. This strategy was also applied to access 1-alkyl-2-methylsulfanyl-5-(4-fluorophenyl)-4-(pyridin-4-yl)imidazoles in six steps starting from 2-chloro-4-methylpyridine.

Published
2018
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8. 11th German Conference on Chemoinformatics (GCC 2015) : Fulda, Germany. 8-10 November 2015

Author

Uli Fechner, Chris de Graaf, Andrew E. Torda, Stefan Güssregen, Andreas Evers, Hans Matter, Gerhard Hessler, Nicola J. Richmond, Peter Schmidtke, Marwin H. S. Segler, Mark P. Waller, Stefanie Pleik, Joan-Emma Shea, Zachary Levine, Ryan Mullen, Karina van den Broek, Matthias Epple, Hubert Kuhn, Andreas Truszkowski, Achim Zielesny, Johannes Fraaije, Ruben Serral Gracia, Stefan M. Kast, Krishna C. Bulusu, Andreas Bender, Abraham Yosipof, Oren Nahum, Hanoch Senderowitz, Timo Krotzky, Robert Schulz, Gerhard Wolber, Stefan Bietz, Matthias Rarey, Markus O. Zimmermann, Andreas Lange, Manuel Ruff, Johannes Heidrich, Ionut Onlia, Thomas E. Exner, Frank M. Boeckler, Marcel Bermudez, Dzmitry S. Firaha, Oldamur Hollóczki, Barbara Kirchner, Christofer S. Tautermann, Andrea Volkamer, Sameh Eid, Samo Turk, Friedrich Rippmann, Simone Fulle, Noureldin Saleh, Giorgio Saladino, Francesco L. Gervasio, Elke Haensele, Lee Banting, David C. Whitley, Jana Sopkova-de Oliveira Santos, Ronan Bureau, Timothy Clark, Achim Sandmann, Harald Lanig, Patrick Kibies, Jochen Heil, Franziska Hoffgaard, Roland Frach, Julian Engel, Steven Smith, Debjit Basu, Daniel Rauh, Oliver Kohlbacher, Jonathan W. Essex, Michael S. Bodnarchuk, Gregory A. Ross, Arndt R. Finkelmann, Andreas H. Göller, Gisbert Schneider, Tamara Husch, Christoph Schütter, Andrea Balducci, Martin Korth, Fidele Ntie-Kang, Stefan Günther, Wolfgang Sippl, Luc Meva’a Mbaze, Conrad V. Simoben, Lydia L. Lifongo, Philip Judson, Jiří Barilla, Miloš V. Lokajíček, Hana Pisaková, Pavel Simr, Natalia Kireeva, Alexandre Petrov, Denis Ostroumov, Vitaly P. Solovev, Vladislav S. Pervov, Nils-Ole Friedrich, Kai Sommer, Johannes Kirchmair, Eugen Proschak, Julia Weber, Daniel Moser, Lena Kalinowski, Janosch Achenbach, Mark Mackey, Tim Cheeseright, Gerrit Renner, Torsten C. Schmidt, Jürgen Schram, Marion Egelkraut-Holtus, Albert van Oeyen, Tuomo Kalliokoski, Denis Fourches, Akachukwu Ibezim, Chika J. Mbah, Umale M. Adikwu, Ngozi J. Nwodo, Alexander Steudle, Brian B. Masek, Stephan Nagy, David Baker, Fred Soltanshahi, Roman Dorfman, Karen Dubrucq, Hitesh Patel, Oliver Koch, Florian Mrugalla, Qurrat U. Ain, Julian E. Fuchs, Robert M. Owen, Kiyoyuki Omoto, Rubben Torella, David C. Pryde, Robert Glen, Petr Hošek, Vojtěch Spiwok, Lewis H. Mervin, Ian Barrett, Mike Firth, David C. Murray, Lisa McWilliams, Qing Cao, Ola Engkvist, Dawid Warszycki, Marek Śmieja, Andrzej J. Bojarski, Natalia Aniceto, Alex Freitas, Taravat Ghafourian, Guido Herrmann, Valentina Eigner-Pitto, Alexandra Naß, Rafał Kurczab, Marcel B. Günther, Susanne Hennig, Felix M. Büttner, Christoph Schall, Adrian Sievers-Engler, Francesco Ansideri, Pierre Koch, Thilo Stehle, Stefan Laufer, Frank M. Böckler, Barbara Zdrazil, Floriane Montanari, Gerhard F. Ecker, Christoph Grebner, Anders Hogner, Johan Ulander, Karl Edman, Victor Guallar, Christian Tyrchan, Wolfgang Klute, Fredrik Bergström, Christian Kramer, Quoc Dat Nguyen, Steven Strohfeldt, Saraphina Böttcher, Tim Pongratz, Dominik Horinek, Bernd Rupp, Raed Al-Yamori, Michael Lisurek, Ronald Kühne, Filipe Furtado, Ludger Wessjohann, Miriam Mathea, Knut Baumann, Siti Zuraidah Mohamad-Zobir, Xianjun Fu, Tai-Ping Fan, Maximilian A. Kuhn, Christoph A. Sotriffer, Azedine Zoufir, Xitong Li, Lewis Mervin, Ellen Berg, Mark Polokoff, Wolf D. Ihlenfeldt, Jette Pretzel, Zayan Alhalabi, Robert Fraczkiewicz, Marvin Waldman, Robert D. Clark, Neem Shaikh, Prabha Garg, Alexander Kos, Hans-Jürgen Himmler, Christophe Jardin, Heinrich Sticht, Thomas B. Steinbrecher, Markus Dahlgren, Daniel Cappel, Teng Lin, Lingle Wang, Goran Krilov, Robert Abel, Richard Friesner, Woody Sherman, Ina A. Pöhner, Joanna Panecka, Rebecca C. Wade, Karen T. Schomburg, Matthias Hilbig, Christian Jäger, Vivien Wieczorek, Lance M. Westerhoff, Oleg Y. Borbulevych, Hans-Ulrich Demuth, Mirko Buchholz, Denis Schmidt, Thomas Rickmeyer, Peter Kolb, Sumit Mittal, Elsa Sánchez-García, Mauro S. Nogueira, Tiago B. Oliveira, Fernando B. da Costa, and Thomas J. Schmidt

Subjects
0303 health sciences, Philosophy, Library and Information Sciences, 16. Peace & justice, Bioinformatics, 01 natural sciences, Computer Graphics and Computer-Aided Design, Meeting Abstracts, language.human_language, 0104 chemical sciences, Computer Science Applications, German, 010404 medicinal & biomolecular chemistry, 03 medical and health sciences, language, Physical and Theoretical Chemistry, Humanities, 030304 developmental biology
Abstract

Author(s): Fechner, Uli; de Graaf, Chris; Torda, Andrew E; Gussregen, Stefan; Evers, Andreas; Matter, Hans; Hessler, Gerhard; Richmond, Nicola J; Schmidtke, Peter; Segler, Marwin HS; Waller, Mark P; Pleik, Stefanie; Shea, Joan-Emma; Levine, Zachary; Mullen, Ryan; van den Broek, Karina; Epple, Matthias; Kuhn, Hubert; Truszkowski, Andreas; Zielesny, Achim; Fraaije, Johannes Hans; Gracia, Ruben Serral; Kast, Stefan M; Bulusu, Krishna C; Bender, Andreas; Yosipof, Abraham; Nahum, Oren; Senderowitz, Hanoch; Krotzky, Timo; Schulz, Robert; Wolber, Gerhard; Bietz, Stefan; Rarey, Matthias; Zimmermann, Markus O; Lange, Andreas; Ruff, Manuel; Heidrich, Johannes; Onlia, Ionut; Exner, Thomas E; Boeckler, Frank M; Bermudez, Marcel; Firaha, Dzmitry S; Holloczki, Oldamur; Kirchner, Barbara; Tautermann, Christofer S; Volkamer, Andrea; Eid, Sameh; Turk, Samo; Rippmann, Friedrich; Fulle, Simone; Saleh, Noureldin; Saladino, Giorgio; Gervasio, Francesco L; Haensele, Elke; Banting, Lee; Whitley, David C; Oliveira Santos, Jana Sopkova-de; Bureau, Ronan; Clark, Timothy; Sandmann, Achim; Lanig, Harald; Kibies, Patrick; Heil, Jochen; Hoffgaard, Franziska; Frach, Roland; Engel, Julian; Smith, Steven; Basu, Debjit; Rauh, Daniel; Kohlbacher, Oliver; Boeckler, Frank M; Essex, Jonathan W; Bodnarchuk, Michael S; Ross, Gregory A; Finkelmann, Arndt R; Goller, Andreas H; Schneider, Gisbert; Husch, Tamara; Schutter, Christoph; Balducci, Andrea; Korth, Martin; Ntie-Kang, Fidele; Gunther, Stefan; Sippl, Wolfgang; Mbaze, Luc Meva'a

Published
2016

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