Derivatives of Methyl N-[5(6)-(4-Aminophenylsulfanyl)benzimidazol-2-yl]carbamate and Phthalic Anhydrides. Synthesis and Biological Properties

Products of the reactions methyl N-[5(6)-(4-aminophenylsulfanyl)benzimidazol-2-yl]carbamate with phthalic anhydrides, involving the aniline nitrogen atoms, were obtained. Biological properties (embryotoxicity and toxicity) of the products and their mixtures with phase-transfer catalysts were studied. On this basis, new antihelminthic agents were developed.     

Reactions of Phosphorodiamidous Acid Esters with α-Halocarbonyl Compounds

Reactions of ethyl and tert-butyl phosphorodiamidites with chloroacetone, bromoacetone, and -chloroethyl acetate were studied. The reaction pathway is determined by the structure of the intermediate quasiphosphonium compound responsible for the formation of the Arbuzov product as well as for the occurrence of the amonalous reaction yielding vinyl phosphate.     

New method of reducing lactones and esters of aldonic acids to sugars

Summary A simple, general method of reducing esters and lactones of aldonic acids to sugars by the action of sodium amalgam, according to which the process is conducted in the presence of a strong cation exchange resin to maintain optimum pH, has been proposed.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya No. 11, pp. 2095–2096, November, 1964     

Thermochemical aspects of interaction of polyimide composites with organic sorbents

Interaction of ITA-31 polyimide binder with a series of industrial sorbents based on styrene and vinylpyridine derivatives was studied.     

Synthesis of tetrathiafulvalene derivatives by dimerization of 1,3-dithiolselenones-2 using triphenylphosphine

Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1278–1279, September, 1991.     

Substituent effects on the nature of hydrogen bonding in organic hydroperoxides and the structure of triphenylmethyl hydroperoxide

It has been found that in the crystalline state in triphenylmethyl hydroperoxide the hydroperoxy group is involved in intermolecular hydrogen-bond formation of the type O-h..., with one C...C -bond in a benzene ring. Conformational analysis and comparison with the results of x-ray structural analysis leads us to conclude that there are very narrow limits on the possible conformations of the COOH group in tert-butyl, cumyl, 1,1-diphenylethyl, and triphenylmethyl hydroperoxides, independent of their aggregation state or the nature of the substituent attached to the COOH group.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 68–73, January, 1990.