Zobrazeno 1 - 10
of 28
pro vyhledávání: '"E. M. Shashkova"'
Publikováno v:
Russian Chemical Bulletin. 42:1848-1854
Monoacylketene aminals containing an unsubstituted NH2 group react as C-nucleophiles with benzoyl isothiocyanate to give the corresponding thioamides which undergo cyclization by sodium methoxide in methanol to afford 6-R-amino-5-acetyl-2-phenyl-3H-p
Publikováno v:
ChemInform. 24
Publikováno v:
ChemInform. 25
Publikováno v:
ChemInform. 25
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 40:2274-2279
An effective method is proposed for the production of the N,S-acetals of diacylketenes and acyl(alkoxycarbonyl)ketenes, based on the addition of methylene-activeβ-diketones andβ-ketoesters to alkyl and aryl thiocyanates catalyzed by Ni(2+) acetylac
Publikováno v:
Russian Chemical Bulletin. 42:1854-1856
Acetylacetone and ethyl acetoacetate undergo addition at the C≡N bond of phenacyl thiocyanate in the presence of Ni(acac)2 to give the respective keteneN, S-acetals, which undergo smooth cyclization to afford 2-methylene-4-phenyl-1, 3-thiazoline de
Autor:
B. S. Bogdanov, E. M. Shashkova, Nguyen Ky Khoa, V. A. Dorokhov, K. L. Cherkasova, L. S. Vasil'ev
Publikováno v:
Russian Chemical Bulletin. 42:1266-1267
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:2386-2390
1. Bromination of i-isopropyl-9-borabicyclo[3.3.1]nonane proceeds as a radical process of substitution of the α-hydrogen atom in the isopropyl group, or with splitting of the B-Ci-Pr bond by an eleetrophilic mechanism; any one of these paths predomi
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 26:818-824
Publikováno v:
Journal of Organometallic Chemistry. 250:23-31
Bromination of 2-isopropyl-2-boraadamantane in CH 2 Cl 2 proceeds simultaneously by both radical and electrophilic mechanisms. The first involves elimination of HBr and formation of 2-(2-bromo-2-propyl)-2-boraadamantane; this rearranges, under the ac