Zobrazeno 1 - 10
of 347
pro vyhledávání: '"V. G. Kharchenko"'
Publikováno v:
Chemistry of Heterocyclic Compounds. 39:1121-1142
Published data and the authors' own experimental results on the reaction of aliphatic, semicyclic, and oxosemicyclic 1,5-diketones and alkylidene- and arylidene-2,2-dicyclanones with ammonia, ammonium acetate, and XNH2 derivatives, where X = Alk, Ar,
Publikováno v:
Russian Journal of Organic Chemistry. 39:201-211
Published and experimental data of authors on halogenation of 1,5-diketones from acyclic (among them chalcogen-containing), semicyclic and bicyclic series resulting in formation of mono-, di-, tri-, and tertahalosubstituted 1,5-dioxo compounds, pyryl
Publikováno v:
Chemistry of Heterocyclic Compounds. 37:463-466
Di(1-oxo-1,2,3,4-tetrahydro-2-naphthyl) sulfide has been obtained and its behavior towards hydrogen sulfide in situ, ammonium acetate, hydrazine hydrate, and hydrogen peroxide has been studied. The structure of the compounds synthesized was establish
Publikováno v:
Chemistry of Heterocyclic Compounds. 36:1032-1038
We have worked out the optimal conditions for synthesis of 2,4-diaryl-5-oxo-5,6,7,8-tetrahydrochromenylium and -thiochromenylium salts based on triketones of the 2-(1,3-diaryl-3-oxopropyl)cyclohexane-1,3-dione series. For the first time, along with 5
Publikováno v:
Chemistry of Heterocyclic Compounds. 36:1007-1025
Literature and characteristic experimental data correlated in the review concern the intramolecular cyclization by various means of substituted 1,5-diketones of the acyclic, semi-, and bicyclic series, proceeding to the formation of oxygen-containing
Publikováno v:
Phosphorus, Sulfur, and Silicon and the Related Elements. 136:621-624
It is shown using 1H NMR spectroscopy that 2,4,6-triphenyl-4H-seleno(thio)pyrans can be isomerized into 2H-isomers by the action of lithium perchlorate or lithium chloride in DMF or only by DMF. The reaction time is found to depend on the Lewis acidi
Autor:
N. V. Pchelintseva, V. G. Kharchenko
Publikováno v:
Chemistry of Heterocyclic Compounds. 32:1113-1130
Published data and the results of the authors' own research on methods for the production of unsaturated 1,5-diketones and halogen-substituted 2-pentene-1,5-diones and their use in the synthesis of difficulty obtainable pyrylium, 3,5-dichloropyrylium
Autor:
P. V. Reshetov, E. V. Lipatova, V. G. Kharchenko, O. P. Plotnikov, O. V. Fedotova, E. B. Kapitonova
Publikováno v:
Chemistry of Heterocyclic Compounds. 32:1131-1135
Research into the reactivity of carbonyl-substituted spirohydrochromans with hydrogen sulfide under the influence of protic and aprotic acids was continued for the case of 3,4,5,6,7,8-hexahydrospiro[chromene-2,1′-cyclohexan]-2-one. The general natu
Publikováno v:
Chemistry of Heterocyclic Compounds. 32:777-780
We have studied the oxidation of 4H-chalcogenopyrans and chalcogenopyrylium salts by lead tetraacetate. We have established that the major reaction products on oxidation of 2,6-diphenyl-4H-thiopyran and selenopyran are 2,6-diphenyl-4H-thio(seleno)pyr
Autor:
V. G. Kharchenko, T. I. Gubina
Publikováno v:
Chemistry of Heterocyclic Compounds. 31:900-916
Data on methods of transforming furans into heterocycles containing oxygen, nitrogen, sulfur, and selenium are discussed and summarized.