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New tripodal 1,2,3-triazole ligands based on triphenylphosphine oxide platform with different linker lengths have been synthesized, and their structure has been determined by elemental analysis, 1H, 13C, and 31P NMR spectroscopy, mass spectrometry, and vibrational (IR and Raman) spectroscopy. The coordination and extraction properties of the new ligands have been studied in the complexation with uranyl nitrate and extraction of micro amounts of uranium(VI) from aqueous phase to 1,2-dichloroethane.

A convenient synthesis of benzylic phosphonates and 2,3-dihydrobenzo[d][1,2]oxaphosphole 2-oxides substituted at the aromatic ring, as well as their precursors, 2-hydroxybenzylic alcohols, from the derivatives of salicylic aldehyde, salicylic acid, and 2-hydroxyacetophenone bearing an additional hydroxy or methoxy group at the para position of the aromatic ring was developed. For the first time, the possibility of selective demethylation of the methoxy group positioned ortho to the methylene phosphonate fragment with retention of the methoxy group at the para position was shown.

New hybrid tripodal propeller ligands on the triphenylphosphine oxide platform with triazole rings in the side arms and alkyl and aryl substituents in the triazole fragments have been synthesized by the click reaction. Composition and structure of the prepared compounds have been established by vibrational (IR, Raman) and multinuclear (1H, 13C, 31P) NMR spectroscopy, elemental analysis, and mass spectrometry. Coordination and extraction properties of the prepared compounds toward Pd(II) have been studied by the example of one of the ligands.

New tripodal ligand, tris(2-carbamoylmethoxyphenyl)phosphine oxide, has been synthesized via the alkylation of tris(2-hydroxyphenyl)phosphine oxide with chloroacetamide. The ligand structure has been studied by means of IR and NMR (1H, 31P) spectroscopy as well as X-ray diffraction.

A new tetrazole tripodal ligand, tris[2-(tetrazol-5-ylmethoxy)phenyl]phosphine oxide, has been obtained. Its structure in crystal and solutions has been elucidated by X-ray diffraction analysis as well as IR, Raman, and multinuclear (1H, 13C, 31P) NMR spectroscopy. Coordination properties of the polydentate ligand have been studied as exemplified by the complexation with lanthanum(III).

2,3-Bis(diphenylphosphoryl)pyridine, a novel N,O-donor bidentate organophosphorus ligand, can serve as an efficient extractant for recovery of f-block elements from nitric acid solutions.

A one-step method for the preparation of 3-substituted 2-(diethylphosphoryl)but-1-en-3-ynes was developed based on the reaction of phosphorylated α-allene alcohols with methanesulfonic anhydride in the presence of triethylamine. The obtained vinylacetylene derivatives are of interest as promising precursors for the creation of organophosphorus heterocyclic compounds.

A novel synthetically important reaction has been developed for the quick, convenient, and high-yield preparation of trimethylsilyl esters of phosphorus(III) acids, synthetically valuable Michaelis–Arbuzov reaction precursors. Commercially and synthetically available initial compounds used are derivatives of propan-2-ol phosphorylated in the second position capable of long-term storage and available silylating reagents: hexamethyldisilazane, bis(trimethylsilyl)acetamide, and diethyl(trimethylsilyl)amine. Also, a stepwise reaction scheme of the starting compounds with silylating reagents has been proposed.

A convenient approach to modify bioactive substrates such as daunorubicin, cytisine, and camphecene with a pentafluorosulfanylvinyl moiety have been suggested. F5S-CH = CH derivatives of da...

Based on 1,3,3,5,5-penta[1-(2,2-dimethyl-1,3-dioxolan-4-yl)methoxy]-1-chlorocyclotriphosphazene, a series of hybrid compounds was obtained by two-step synthesis. In the molecules of the compounds obtained, hydrophobic organic residues are attached to the cyclotriphosphazene nucleus via a linker. A dialkyl substituted 1,2,3-triazole synthesized by click-chemistry methodology from acetylenic cyclotriphosphazene derivatives and organic azides in the presence of Cu(I) can be used as a linker connecting pentadioxolane-substituted phosphazene core. The reaction proceeds regioselectively with the formation of 1,4-disubstituted 1,2,3-triazoles only.

The solvent extraction of lanthanides (III) (except for Pm) from chloride medium (at μ = 0.1) into an organic phase containing 4-benzoyl-3-methyl-1-phenyl-5-pyrazolone (HPy) and neutral tripodal ligands on the triphenylphosphine oxide platform with anchored carbamoyl side arms (2-R2NC(O)CH2OC6H4)3PO, where R = Bu (L1) and cyclo-Hex (L2) has been studied. A considerable synergistic effect (up to 107) has been observed in the presence of neutral ligands L1 or L2 in the organic phase containing HPy. The stoichiometry of the Ln(III) extracted species has been determined by slope analysis and the equilibrium constants have been calculated. It has been found that the lanthanides(III) ions are extracted with mixtures of HPy and neutral ligands L1 or L2 in toluene as LnPy3L species. The [LaPy3(H2O)2], and new [LaPy3(L1)] and [LaPy3(L2)] complexes have been synthesized and characterized via elemental analysis and IR spectroscopy. Solution structure of the above complexes has been examined by IR and multinuclear (1H, 13C, and 31P) NMR spectroscopy in toluene-d8 and CDCl3. The effect of diluents on synergistic extraction and the solution structure of mixed complexes are discussed.

The first observation of luminescence for Mn(II) complexes with a square-pyramidal geometry (C4v) of the metal is reported. The complexes of such type, namely [Mn(L)2Hal]X, where L is an O,O′-chelating ligand Me2N–CH(Ph2PO)2, Hal = Cl or Br, and X = Br, I or [MnCl4], show at ambient temperature red photoluminescence (λemmax ≈ 620 nm) with millisecond lifetimes (3.8–7.6 ms). This emission, stemming from spin-forbidden 4E(G) → 6A1(S) transitions in square-pyramidally coordinated Mn2+, is found to be responsive to temperature. Upon cooling the complexes from 300 to 77 K, the red-shift of the emission band by ≈20 nm takes place, which is accompanied by the increase of its integral intensity and lifetime. The peculiarities of the discovered Mn2+(C4v) luminescence are discussed against the classical luminescence that occurs in octahedral (Oh) and tetrahedral (Td) surroundings.

The reaction of 1,3-bis(diphenylphosphinyl)propane (dpppO 2 ) with MnI 2 , depending on the reactants ratio, affords either 1D coordination polymer, [Mn(dpppO 2 )I 2 ] n ( 1 ), or cage-like complex [Mn 2 (dpppO 2 ) 4 I 2 ]l 2 ( 2 ). Polymer 1 contains Mn(II) ions in a tetrahedral [Mn@O 2 I 2 ] arrangement, while the metal ions of 2 feature a square-pyramidal [Mn@O 4 I] geometry. At ambient temperature, 1 emits green phosphorescence (λ max = 530 nm) with unusually short lifetime being 50 µs, while 2 displays long-lived red phosphorescence with λ max = 660 nm and the lifetime of 1400 µs.

A series of precursors of novel tripodal ligands (2-XCH2CH2CH2OC6H4)3PO, where X = AcO, HO, MeSO2O, Br, N3, were synthesized by the alkylation of the starting tris(2-hydroxyphenyl)phosphine oxide with 3-bromopropyl acetate followed by hydrolysis of the resulting triacetate to triol and conversion of the latter to trimesylate. Treratment of the resulting trimesylate with LiBr or NaN3 was used to prepare the corresponding tribromo or triazido derivatives.

1-Hydroxy-3-(5,7-dimethyl-2-oxo-1,2-dihydro-1,8-naphthyridin-1-yl)propylidenebisphosphonic acid has been synthesized. The structure of the acid and its precursors synthesized for the first time, 3-(5,7-dimethyl-2-oxo-1,2-dihydro-1,8-naphthyridin-1-yl)propionic acid and the corresponding methyl ester, in the solid state and in the DMSO solution has been elucidated by means of vibrational (IR and Raman) and multinuclear (1H, 13C, and 31P) NMR spectroscopy.

The reaction of methyl- and phenylphosphonic dichlorides with phenols in the presence of anhydrous magnesium chloride as catalyst or magnesium metal as precatalyst provides a simple, efficient, and practical method of synthesis of the corresponding aryl methyl- and phenylphosphonochloridates.

Two unprecedented organic–inorganic hybrid complexes, [Mn(L)3]MnCl4 (1) and [Mn(L)3]MnBr4 (2), have been synthesized in 88–92% yields via reaction of Mn(II) halides with Ph2P(O)CH2C(O)NEt2 (L) in a 3:2 M ratio. X-ray diffraction analysis of 2 reveals that the metal ion of the [Mn(L)3]2+ cation has an octahedral geometry, while the [MnBr4]2− anion contains tetrahedrally coordinated Mn(II). At ambient temperature, the solid complexes 1 and 2 exhibit bright deep-red phosphorescence ( λ max em = 660 and 670 nm) with the lifetimes of 3–3.7 ms and photoluminescence quantum yields of 6% and 27%, respectively.

A ligand system containing three carbamoyl moieties secured onto a triphenylphosphine oxide platform (2-R2NC(O)CH2OC6H4)3PO, where R = Me (1), Bu (2), and cyclo-Hex (3) has been developed for lanthanide complexation and extraction from aqueous solutions. The influence of non-coordinating alkyl substituents at the nitrogen atoms in the carbamoyl side arms on coordination and extraction properties of tripodal ligands 1–3 was studied. Two new ligands 1 and 3 with alkyl substituents of different bulkiness were synthesized and characterized by spectroscopic methods. Single-crystal X-ray structures have been determined for ligands 1 and 2. The selected coordination chemistry of ligands 1–3 with Ln(NO3)3 (Ln = La, Nd, Lu) has been evaluated. The 1:1 complexes of all ligands 1–3 were synthesized and characterized via elemental analysis and IR spectroscopy; in addition, the crystal structure of the ligand 1 complex with neodymium nitrate was determined by X-ray diffraction. Solution structure of 1:1 complexes was examined by IR and multinuclear (1H, 13C, and 31P) NMR spectroscopy. A formation of 1:2 complexes with lanthanum and lutetium nitrates (IR, NMR, ESI-MS) has been examined and structure of the major components of 1:2 complexes solutions has been suggested for ligands 1–3. Preliminary extraction studies of Ln(III) (Ln = La, Nd, Eu, Lu) from 3 M NH4NO3 into 1,2-dichloroethane show that ligands 2 and 3 recover lanthanides much better than their mono analog [2-(Bu2NC(O)CH2O)-5-Et-C6H3]P(O)Ph2 and known extractant Ph2P(O)CH2C(O)NBu2.

Unprecedented organic–inorganic hybrid complexes, [Mn(L)3]MnHal4, containing both four- and hexacoordinated Mn2+ ions were synthesized by reacting MnCl2 or MnBr2 with bis(phosphine oxide) ligands (L) such as dppmO2, dppeO2, and 2,3-bis(diphenylphosphinyl)-1,3-butadiene (dppbO2). In the [Mn(L)3]2+ cation of the complexes, the Mn2+ ion features a [MnO6] octahedral coordination environment (Oh), and the [MnHal4]2− anion adopts a tetrahedral geometry (Td). These “two-in-one” complexes exhibit strong long-lived luminescence (τav = 12–15 ms at 300 K) having interesting thermochromic behavior attributed to the thermal equilibrium between two emission bands. So, in an emission spectrum of the typical complex [Mn(dppbO2)3]MnBr4, the intense “red” (ca. 620 nm) and weak “green” (ca. 520 nm) bands, originating from Mn2+ ions in Oh and Td environments, respectively, are observed. Cooling from 300 to 77 K simultaneously leads to (i) redshift of both bands by ca. 20 nm, (ii) increasing their intensities, and (iii) causing a substantial change of their integral intensity ratio from about 4 : 1 to 2 : 1. As a result, the colour of the emission changes from orange (CIE 0.56, 0.45) at 300 K to deep red (CIE 0.62, 0.39) at 77 K. This behavior was rationalized using steady-state and time-resolved fluorescent spectroscopy at various temperatures. The high photoluminescence quantum yields (up to 61% at 300 K) and fascinating dual-emissive phosphorescence coupled with high thermal stability and solubility suggest a high potential of this novel class of emissive Mn2+ complexes as promising emitters for OLED devices and potential stimuli-responsive materials.

A number of precursors of new tripodal ligands was obtained by hydroxyethylation of the starting tris(2-hydroxyphenyl)phosphine oxide, followed by conversion of the resulting tris[2-(2-hydroxyethoxy) phenyl]phosphine oxide to trimesylate. The treatment of the latter with LiBr or NaN3 afforded the corresponding tribromo and triazido derivatives.

Diphenylphosphinoylallenes containing a ClCH2 group were synthesized, and their reaction with cytisine was studied. It was shown that the reaction involves exclusives as nucleophilic substitution of chlorine in the chloromethyl group. The synthesized conjugates of cytisine with diphenylphosphinoylallene derivatives are of interest as potential agonists of nicotinic acetylcholine neuroreceptors (nAChRs).

A reaction of N-allyl-substituted aminomethylene-1,1-bisphosphonates with aromatic nitrile N-oxides was used to obtain new aminomethylenebisphosphonates with one or two 3-arylisoxazoline rings at the nitrogen atom. NMR spectroscopy studies showed that the bisphosphonates with two isoxazoline fragments in the molecule exist in solution as a mixture of two diastereomers.

One-step reductive amination of aromatic aldehydes using an anthracycline antibiotic daunorubicin resulted in the preparation of its new N-derivatives, which are of interest as potential antitumor drugs.

A series of pentaalkoxychlorocyclotriphosphazenes was synthesized. The spectral characteristics of the synthesized compounds (31Р, 1H, 13С NMR) were studied. It was shown that the complexity of the NMR spectra of pentaalkoxychlorocyclotriphosphazenes is associated with the magnetic nonequivalence of the phosphorus atoms in the triphosphazene cycle and the hydrogen and carbon atoms in the alkoxy groups on these phosphorus atoms, as well as the cis/trans isomerism of the latter groups.

Methods have been developed for functionalizing the alkaloid cytisine via introduction of alka-1,3- and -2,3-dien-2-ylphosphonate fragments. The main pathway of the reaction of cytisine with 2-(diethoxyphosphoryl) alka-2,3-dien-1-yl methanesulfonates is nucleophilic substitution of the methanesulfonyloxy group with retention of the alkadiene skeleton. A minor reaction pathway is nucleophilic substitution with formation of alka-1,3-dien-2-ylphosphonates. Cytisine conjugates with exclusively alka-1,3-dien-2-ylphosphonate fragment have been synthesized by copper(I)-catalyzed 1,3-dipolar cycloaddition of N-(prop-2-yn-1-yl)cytisine to 3-azidoalka-1,3-dien-2-ylphosphonates.

Reaction of 1,2-bis(diphenylpsphoryl)benzene 1,2-[Ph2(O)P]2C6H4 (L) with f-element nitrates resulted in 1:1 and 1:2 complexes. The isolated complexes, namely, [UO2(L)(NO3)2]·MeCN (1), [UO2(L)2(NO3)](NO3)·MeCN (2), [Th(L)2(NO3)3](NO3)·MeCN·H2O (3), [La(L)2(NO3)3]·0.5MeCN·1.5H2O (4), and [Lu(L)2(NO3)2](NO3)·2MeCN (5) have been characterized by elemental analysis and IR spectroscopy. The structures of complexes 1, 2, and 5 have been determined by single-crystal X-ray crystallography. Intraligand π-stacking and interligand C H… π interaction have been observed in the crystalline complexes. The π-stacking and C H… π interaction energy in two uranyl complexes 1 and 2 have been estimated from Bader’s AIM theory calculations performed at the DFT level. Solution structure of all complexes has been investigated by IR and multinuclear (1H, 13C, and 31P) NMR spectroscopy. The formation of 1:3 complexes with lanthanum nitrate (IR, 31P NMR) has been examined. Preliminary extraction study of U(VI), Th(IV), and Ln(III) from 2 M HNO3 into 1,2-dichloroethane have shown that ligand L recovers U(VI), Th(IV), and La(III) in the same extent as its tetraphosphoryl analog 1,2,4,5-[Ph2(O)P]4C6H2 (L') but it recovers Eu(III), and Lu(III) by several times better than L'. Furthermore, an improved modified method for the synthesis of ligand L has been suggested.

New 1,8- and 1,6-naphthyridines containing a phosphoryl group in the side chain were synthesized via Friedlӓnder reaction by combining the appropriate aminonicotinic aldehydes and phosphoryl ketones in alcohol medium in the presence of basic catalysts (pyrrolidine or KOH). A series of phosphoryl-substituted 1,8-naphthyridines effectively extracted uranium(VI) from neutral aqueous solutions containing lanthanide(III) into 1,2-dichloroethane.

Anabasine-containing azides and acetylenes were used as building blocks in copper(I)-catalyzed 1,3-dipolar cycloaddition reactions with a series of acetylenes and azides via click methodology to provide a range of anabasine conjugates being potential ligands for neuronal nicotinic acetylcholine receptors.

Aza-Michael reaction of (E)-4-(diphenylphosphoryl)but-3-en-2-one (1) with a number of mono-and bicyclic nitrogen heterocycles proceeds regioselectively in the absence of catalysts with the formation of corresponding β-azahetaryl β-diphenylphosphoryl ketones; in the case of imidazole, the presence of chiral organic catalysts allows one to increase the yields of the adducts and to obtain them in enantiomerically enriched form.

A simple and effective general method of synthesis of α- and β-diphenylphosphorylated secondary alkanols by the reduction of the corresponding phosphorylalkanones with NaBH4 was developed. The extraction properties of the resulting phosphorylalkanols Ph2P(O)(CR2)nCH2CH(OH)Me (n = 0, 1; R = H, Me) were studied in the recovery of f-elements (LaIII, NdIII, HoIII, YbIII, UVI, ThIV) from nitric acid solutions into chloroform and compared with those of both related phosphorylketones and known extractants (n-BuO)3PO, (n-C8H17)3PO, and Ph2P(O)CH2C(O)N(n-Bu)2.

Hybrid scorpionate ligand (OPPh2)2CHCH2C(O)Me (L) was synthesized and characterized by spectroscopic methods and X-ray diffraction. The selected coordination chemistry of L with UO2(NO3)2 and Ln(NO3)3 (Ln = La, Nd, Lu) has been evaluated. The isolated mono- and binuclear complexes, namely, [UO2(NO3)2L] (1), [{UO2(NO3)L}2(μ2-O2)]·EtOH (2), [La(NO3)3L2]·2.33MeCN (3), [Nd(NO3)3L2]·3MeCN (4), [Nd(NO3)2L2]+·(NO3)−·EtOH (5) and [Lu(NO3)3L2] (6) have been characterized by IR spectroscopy and elemental analysis. Single-crystal X-ray structures have been determined for complexes 1-5. Intramolecular intraligand π-stacking interactions between two phenyl fragments of the coordinated ligand(s) were observed in all complexes 1-5. The π-stacking interaction energy was estimated from Bader's AIM theory calculations performed at the DFT level. Solution properties have been examined using IR and multinuclear ((1)H, (13)C, and (31)P) NMR spectroscopy in CD3CN and CDCl3. Coordination modes of L vary with the coordination polyhedron of the metal and solvent nature showing many coordination modes: P(O),P(O), P(O),P(O),C(O), P(O),C(O), and P(O). Preliminary extraction studies of U(VI) and Ln(III) (Ln = La, Nd, Ho, Yb) from 3.75 M HNO3 into CHCl3 show that scorpionate L extracts f-block elements (especially uranium) better than its unmodified prototype (OPPh2)2CH2.

Cytisine and anabasine derivatives containing an acetylenic fragment were used as building blocks in 1,3-dipolar cycloaddition reactions with substituted N-hydroxybenzenecarboximidoyl chlorides, catalyzed by copper(I) salt. The reactions with N-propargylcytisine were not selective, and the products were mixtures of 3,5-disubstituted isoxazoles and small amounts (5–8%) of 3,4-disubstituted isomers. 1,3-Dipolar cycloaddition with N-propargylanabasine afforded 3,5-disubstituted isoxazole derivatives with high regioselectivity.

A convenient method for the stereoselective synthesis of diethyl [(2S,4S)-4-hydroxytetrahydrofuran-2-ylmethyl]phosphonates was developed based on preparation of phophorylated glycol followed by its intramolecular cyclization and hydrogenation. It was shown that the nature of the hydrogenation products depends on the presence of water in the solvent.

The structure of tripodal phosphoryl alkanols [2-HO(CH2)nOC6H4]3P = O (n = 2, 3, 4) have been studied in crystal and solution by X-ray diffraction and FTIR. Linker length in the phosphoryl alkanols has a dramatic effect on their supramolecular structure in crystal and the type of hydrogen bonding in solution. It has been shown that compounds with n = 2 and 4 in crystal form linear and zigzag chains, respectively, while compound with n = 3 produces ribbons united into 2D networks. IR spectral study indicates that solutions of the triols contain monomers with intramolecular simple or bifurcate association of P O and OH groups, linear and cyclic dimers. The concentration of molecules with bifurcate bond decreases upon linker elongation. The studied compounds showed insignificant anticancer activity.

A dinuclear Re(I) tricarbonyl complex, [Re2(CO)6(L)Br2], has been synthesized by the reaction of 1,2,4,5-tetrakis(diphenylphosphino)benzene (L) with 2 equiv. of Re(CO)5Br. In the solid state at 300 K, this complex emits untypical yellow-green phosphorescence (λmax ≈ 530 nm), which, upon cooling to 77 K, strongly enhances, the color of the complex turning to turquoise (λmax ≈ 505 nm).

In the present work, we performed structural modification of 2-hydroxy-9(10),16(17),23(24)-tri-tert-butyl-29H,31H-phthalocyanine (1) using phosphonitrilic chloride trimer (hexachlorocyclotriphosphazene). Despite the wide availability of phosphazenes and their derivatives, including polymeric materials based on them, this is one of the few examples of the introduction of an active phosphazene cycle into the structure of a macroheterocyclic compound. Target free-base ligand 2 was characterized by the MALDI-TOF/TOF mass spectrometry, as well as the 1H, 31P NMR and FT-IR spectroscopy. Also, a tendency towards H-aggregation in polar media was demonstrated. Theoretical calculations based on time-dependent Hartree-Fock approach for nonlinear optical properties have allowed revealing a self-defocusing effect in the case of phthalocyanine 2, which makes it an interesting candidate for all-optical switching, two-photon imaging, and optical power limiting applications.

New cross-linked polymers with different morphology based on cyclotriphosphazene and polysiloxane precursors were obtained by the thiol-ene radical addition. A series of samples such as aerogels with various density, a xerogel, a monolith and a film were prepared and their physico-mechanical properties were studied. Phosphazene-containing polymeric aerogels were prepared directly in supercritical carbon dioxide (scCO2) media. The morphology of the samples was investigated by scanning electron microscopy (SEM). The average particle size in the aerogels was in the range of 2–15 μm. The mechanical properties of all the samples were studied by the compression test. It was shown that the Young modulus of the monolith (95 MPa) was 7 times larger than that of the xerogel (14 MPa). The aerogels are porous elastic polymers with the Young modulus of 0.032 and 0.257 MPa, correspondingly. The thermal stability of the samples was evaluated by thermal gravimetric analysis (TGA). Weight loss was observed in the range of 255–298 °C in air and 251–295 °C in argon for all the samples. Aerogel samples have a greater water contact angle (130° for A1 and 136° for A2) than xerogel (122°), monolith (121°) and film samples (84°), which can be explained by the lotus effect.

New 1,2-alkadienylphosphonates and diphenyl(1,2-alkadien-1-yl)phosphine oxides were synthesized by a convenient and efficient method. These compounds are useful as intermediates in the preparation ...

A series of seventeen tetrazole derivatives of 1,7,7-trimethyl-[2.2.1]bicycloheptane were synthesized using click chemistry methodology and characterized by spectral data. Studies of cytotoxicity and in vitro antiviral activity against influenza virus A/Puerto Rico/8/34 (H1N1) in MDCK cells of the compounds obtained were performed. The structure-activity relationship analysis suggests that to possess virus-inhibiting activity, the compounds of this group should bear oxygen atom with a short linker (C2-C4), either as a hydroxyl group (18, 19, 29), keto-group (21) or as a part of a heterocycle (24). These compounds demonstrated low cytotoxicity along with high anti-viral activity.

2-(Diethoxyphosphoryl)- and 2-(diphenylphosphoryl)but-2-en-3-ynes, accesible from 4-mesyloxy-3-phosphorylbuta-1,2-dienes, undergo [2+3] cycloaddition with benzonitrile N-oxide or azides to afford isoxazole or 1,2,3-triazole derivatives, respectively.

Treatment of (2-methoxyprop-2-yl)diphenylphosphine oxide with alkyl bromides affords alkyl(diphenyl)phosphine oxides in good yields.

The reaction of Mn(ClO 4 ) 2 ·6H 2 O with 1,2,4,5-tetrakis(diphenylphosphinyl)benzene (L) in DMF affords one-dimensional coordination polymer (CP), [MnL(DMF) 2 ](ClO 4 ) 2 ·DMF, in 87% yield. The cationic chains of the CP are assembled from alternating Mn(II) ions and ligand molecules; each metal ion has a octahedral MnO 6 environment composed of four oxygen atoms from two adjacent ligands and two DMF oxygen atoms. At the temperatures below 200 K, this CP demonstrates a red phosphorescence with λ em max ~660 nm and lifetimes of 1.5–4.5 ms. The EPR study reveals the high-spin state of the Mn(II) ions and the absence of exchange interactions between them.

Hybrid molecules wherein five-membered rings of ferrocene or cymanthrene are covalently bonded with the amino group of daunorubicin through a methylene linker, have been synthesized by reductive amination of the corresponding aldehydes [M]C5H4CHO {[M] = CpFe or (CO)3Mn} using daunorubicin as an amine component.

Treatment of (2-hydroxyprop-2-yl)diphenylphosphine oxide with silylating agents affords trimethylsilyl diphenylphos-phinite in high yield.

Anabasine-, cytisine-, and camphor-containing azides and acetylenes were used as building blocks in copper(I) catalyzed 1,3-dipolar cycloaddition reactions with a series of acetylenes and azides vi...

Aza-Michael reaction of ( E )-4-(diphenylphosphoryl)but-3-en-2-one with mono- and bicyclic nitrogen heterocycles proceeds regioselectively in the absence of catalysts to give the corresponding s-diphenylphosphoryl-b-azahetarylalkanones. Its reaction with imidazole in the presence of chiral organocatalysts affords the corresponding enantiomerically enriched adduct in higher yield.