Zobrazeno 1 - 10
of 34
pro vyhledávání: '"B. S. Chekavichus"'
Autor:
Gunars Duburs, B. S. Chekavichus, J. Uldrikis, Arkadij Sobolev, D. Tirzite, G. Tirzitis, B. A. Vigante
Publikováno v:
Chemistry of Heterocyclic Compounds. 43:225-232
Different modifications of the Hantzsch synthesis using 10-methyl-10H-phenothiazine-3-carbaldehyde gave 4-(10-methyl-10H-phenothiazin-3-yl)-substituted 1,4-dihydropyridine-3,5-di-, 5-oxo-4,5-dihydro-1H-indeno[1,2-b]pyridine-, and 5,5-dioxo-4,5-dihydr
Publikováno v:
Chemistry of Heterocyclic Compounds. 36:862-869
Derivatives of 2H-5,6-dihydro-1,3-thiazine are formed by the reaction of acetothioacetic acid ethyl ester with aromatic aldehydes on heating in ethanol in the presence of aqueous ammonia.
Publikováno v:
Chemistry of Heterocyclic Compounds. 34:950-956
The polarographic properties (potentials, number of electrons, reversibility) of the electrochemical reduction of 3,5-diethoxycarbonyl-3-(p-nitrobenzoyl)-6-(p-nitrophenyl)-1,2,3,4-tetrahydropyridine and its derivatives in dimethylformamide have been
Publikováno v:
ChemInform. 27
Publikováno v:
ChemInform. 29
Publikováno v:
ChemInform. 32
Derivatives of 2H-5,6-dihydro-1,3-thiazine are formed by the reaction of acetothioacetic acid ethyl ester with aromatic aldehydes on heating in ethanol in the presence of aqueous ammonia.
Publikováno v:
Chemistry of Heterocyclic Compounds. 28:1280-1285
In the primary electrochemical reduction of 1-(nitrophenyl)-3,5-dicarbethoxy-4-phenyl-1,4-dihydropyridine in DMF, free radicals of nitrophenyl type are formed; these are the products of a one-electron reduction of cathode-protonated molecules of the
Autor:
I. P. Skrastin'sh, R. M. Zolotoyabko, A. é. Sausin'sh, V. V. Kastron, G. Ya. Dubur, B. S. Chekavichus
Publikováno v:
Chemistry of Heterocyclic Compounds. 27:989-994
4-Aryl-3,5-dialkoxycarbonyl-2,6-dimethyl-1,4-dihydropyridines are brominated by N-bromosuccinimide in methanol at room temperature at the methyl groups at positions 2 and 6 to form mono-, di-, tri-, and tetrabromo derivatives. When the N-unsubstitute
Publikováno v:
Chemistry of Heterocyclic Compounds. 27:380-386
In the electrochemical reduction of 2,6-bis- and 2,4,6-tris(nitrophenyl) derivatives of 3,5-dicarbethoxy-1,4-dihydropyridine, in the first stage, one of the para-nitrophenyl groups in position 2 or 6 of the heterocycle is reduced. Free radicals have
Publikováno v:
Chemistry of Heterocyclic Compounds. 27:302-306
The possibility of obtaining 1-aryl-3,5-diethoxycarbonyl-2,6-unsubstituted 1,4-dihydropyridines with electronacceptor substituents in the N-phenyl radical was demonstrated. The intermediate products of their formation, viz., 2,4-bis(arylaminomethyien