Reaction of sulfenamides withN,N-dimethylaniline in the presence of phosphorus(v) oxochloride

Reaction of arylsulfenamides withN,N-dimethylaniline in the presence of POCl₃ at room temperature affords unsymmetrical diaryl sulfide, onlypara-substitutedN,N-dimethylanilines being formed. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 178–179, January, 2000.     

Reaction of sulfenamides withN,N-dimethylaniline in the presence of phosphorus(v) oxochloride

Reaction of arylsulfenamides withN,N-dimethylaniline in the presence of POCl₃ at room temperature affords unsymmetrical diaryl sulfide, onlypara-substitutedN,N-dimethylanilines being formed. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 178–179, January, 2000.     

Synthesis of heterocyclic compounds in the presence of transition metal complexes (review)

The most recent data on reactions involving the formation of heterocycles that take place in the presence of palladium, nickel, cobalt, and iron complexes are examined. The mechanisms of the reactions are discussed in the light of modern concepts of catalysis by metal complexes. The particular significance of metal complex catalysts for the synthesis of heterocycles with unique structures is demonstrated. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 147–163, February, 1980.     

Quantum-chemical study of the coordination isomerism of P(V)-P(IV) in chlorophosphoric heterocyclic compounds

Using the RHF/6-31G method calculations have been carried out on the isomeric chlorophosphoric heterocyclic molecules C₆H₄O₂PCl₂N=CClX₃ and C₆H₄O₂PCl=NCCl₂CX₃ (X = F and Cl) with full optimization of their geometries. Conclusions are drawn regarding the chlorotropic conversion of these isomers which contain phosphorus with coordination numbers V and IV. The relative stabilization energies of the isomeric compounds have been determined for variation of X. __________ Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 294–298, February, 2007.     

Arylselenenation of conjugated dienes by arylselenenamides in the presence of phosphorus(V) oxyhalides

Arylselenenation of conjugated and non-conjugated dienes by arylselenenamides in the presence of phosphorus(V) oxyhalides has been studied. Reactions with conjugated dienes lead to 1,4-adducts whilst only addition to double bonds takes place in reactions with non-conjugated dienes.     

Thermal behavior of poly(bisphenol A carbonate) in the presence of phosphorus compounds

To clarify the interaction between poly(bisphenol A carbonate) (PBAC) and phosphorus compounds such as triphenylphosphine oxide (TPPO), triphenyl phosphate (TPP), and resorcinol bis(diphenyl phosphate) (RDP), PBAC was heated in the presence of these phosphorus compounds at 240 °C for 2 h, and the resulting polymers were analyzed by ¹H NMR spectroscopy and gel permeation chromatography. When heated in the presence of TPPO, the PBAC sample decomposed extensively, resulting in a substantial decrease in molecular weight. On the other hand, thermal treatment in the presence of the phosphates increased the molecular weight. In both cases the molecular weight distribution became narrower. Thermal treatment of PBAC in the presence of both TPPO and TPP allowed us to control the molecular weight with a narrower distribution. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 1069–1074, 2004     

Carbonylrhodium(I) complexes with heterocyclic nitrogen compounds

Crystalline complexes of rhodium(I) of the type [Rh(CO)₂(NN)] [RhX₂-(CO)₂] (NN  2,2'-bipyridyl, 1,10-phenanthroline, 2,9-dimethyl-1,10-phenanthroline, 4,7-dipheynl-1,10-phenanthroline; X = Cl, Br) have been prepared. An ionic chain-like structure involving metal-metal interactions has been established by measurement of the reflectance spectra, absorption electronic spectra and electrical conductivities. The IR spectra have been examined over the 50–4000 cm^-1 range.     

Reactions involving isotopic exchange of heterocyclic compounds with D2O in the presence of transition metals (review)

The results of isotopic exchange with D₂O of various O-, N-, and S-containing heterocycles and some hydrocarbons on transition metals are discussed from the positions of the theory of -complex adsorption. The effect of various fragments of the molecules (the aromatic or alicyclic ring, electron-donor or electron-acceptor substituents, double bonds, and the number and nature of the heteroatoms) on the character of the substrate-catalyst interaction and on the reaction as a whole is examined on the basis of kinetic data from ¹H and ¹³C NMR spectroscopy and Chromatographic mass spectrometry. Isotopic exchange mechanisms are discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1011–1021, August, 1982.     

Tungsten(V) dimeric complexes with heterocyclic dithiocarbamates

In this paper we report the syntheses and study of a number of oxo- and sulphido-bridged tungsten(V) complexes with morpholine dithiocarbamate and piperidine dithiocarbamate as ligands. We assign the following formulae to the complexes: W₂O₃(Rdtc)₄, W₂O₄(Rdtc)₂, W₂O₂S₂(Rdtc)₂ and W₂O₃S(Rdtc)₂ (where R = morpholine and piperidine), based on the analytical data. We have studied the complexes by IR and electronic spectra, and magnetic susceptibility measurements. We assign in the IR spectra the following bands: W=O (ν_s=939–948 cm^?1), W-O_b(ν_a=813–819 cm^?1, ν_s = 431–448 cm^?1), W-S_b (ν_a=470–476 cm^?1, ν_s = 368–370 cm^?1, C-N (β = 1511–1519 cm^?1) and C-S (ν = 1090–1113 cm^?1). The low values of the magnetic moments (0.03–0.60 B.M.) are in accordance with a dimeric species of tungsten(V).     

Luminescent heterocyclic compounds with two fluorophors (a review)

Various types of bifluorophoric heterocyclic compounds are described and a classification of them based on chemical structure is given; the connection between the structure of the bifluorophors and their luminescent properties is discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 579–592, May, 1935.     

Ditolyldithiophosphato derivatives of phosphorus(III) and phosphorus(V)

O,O′-Ditolylphosphorodithioates of phosphorus(III), [(o-, m-, or p-CH₃C₆H₄O)₂PS₂] _n PCl_3−n , and phosphorus(V), [(o-, m-, or p-CH₃C₆H₄O)₂-PS₂] _n POCl_3−n , (n = 1, 2, and 3) were isolated as colorless viscous liquids by the reaction of PCl₃ and POCl₃ with sodium ditolylphosphorodithioate, (o-, m-, or p-CH₃C₆H₄O)₂PS₂Na, in 1:1, 1:2, and 1:3 molar ratios in toluene. These compounds were characterized by elemental analyses, molecular weight measurements, IR, and NMR (¹H, ³¹P, and ¹³C) spectroscopic studies, which indicated a less common monodentate linkage of dithiophosphate moieties in both phosphorus(III) and phosphorus(V) derivatives leading to a tetrahedral geometry around the phosphorus atom. Correspondence: Sushil K. Pandey, Department of Chemistry, University of Jammu, Baba Saheb Ambedkar Road, Jammu 180 006 (J & K), India.     

Ditolyldithiophosphato derivatives of phosphorus(III) and phosphorus(V)

O,O′-Ditolylphosphorodithioates of phosphorus(III), [(o-, m-, or p-CH₃C₆H₄O)₂PS₂] _n PCl_3−n , and phosphorus(V), [(o-, m-, or p-CH₃C₆H₄O)₂-PS₂] _n POCl_3−n , (n = 1, 2, and 3) were isolated as colorless viscous liquids by the reaction of PCl₃ and POCl₃ with sodium ditolylphosphorodithioate, (o-, m-, or p-CH₃C₆H₄O)₂PS₂Na, in 1:1, 1:2, and 1:3 molar ratios in toluene. These compounds were characterized by elemental analyses, molecular weight measurements, IR, and NMR (¹H, ³¹P, and ¹³C) spectroscopic studies, which indicated a less common monodentate linkage of dithiophosphate moieties in both phosphorus(III) and phosphorus(V) derivatives leading to a tetrahedral geometry around the phosphorus atom.     

One-electron transfer in the dehydroaromatization of heterocyclic compounds (survey)

The survey systematizes studies of recent years on the mechanism of the dehydroaromatization of heterocyclic compounds, as well as the dehydrogenation of functionally related systems. The available material is arranged according to types of dehydrogenating agents. On the basis of the literature data and the author's own experimental data, the stepwise mechanism of the oxidative dehydrogenation of heterocyclic compounds is substantiated.Published to stimulate discussion.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1011–1025, August, 1984.     

Isotope exchange of heterocyclic compounds with D2O in the presence of transition metals

During a study of deuterium-hydrogen exchange of two-ring condensed heterocycles in the presence of a Pt catalyst it was observed that the degree of deuteration decreases in the order benzofuran naphthalene > benzothiophene. It was found that the degree of deuteration of 2-acetylbenzofuran is 80%, whereas for 2-propylbenzofuran it is only 8%. The degree of deuteration of hydrogenated derivatives decreases in the order coumarin > chromene > dihydrocoumarin; the formation of polydeuterated derivatives is observed for coumarin, whereas products of replacement of one hydrogen atom by deuterium predominate for chromene and dihydrocoumarin.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 451–453, April, 1981.     

Asymmetric catalysis involving heterocyclic compounds (review)

The newest advances in the realization of asymmetric reactions with the aid of both heterogeneous and metal-complex catalysts are examined. Heterocyclic compounds are used as prochiral substrates and chiral ligands in the compositions of the catalysts. Chief attention is directed to the relationship between the enantioselectivity and the structures of the heterocyclic compounds.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 291–303, March, 1983.     

On the reduction of S-alkyl-thionocarbonates (xanthates) with phosphorus compounds

[reaction: see text] Reductive cleavage of the carbon-sulfur bond present in S-alkyl-thionocarbonates (xanthates) was achieved by high-yielding, tin-free radical reactions based on phosphorus reagents. The combination hypophosphorous acid/triethylamine/AIBN led to fast, efficient, and smooth formation of the alkane. Reduction with diethyl phosphite was sufficiently slow to permit sequential intermolecular addition of a 2-oxoalkyl xanthate onto an olefin followed by cleavage of the newly formed carbon-sulfur bond.