Zobrazeno 1 - 10
of 18
pro vyhledávání: '"M. N. PROTOPOPOVA"'
Autor:
A. M. Gal'minas, M. N. Protopopova
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 25
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 40:202-204
This is the first report of the addition of propyl and phenyl mercaptans at the double bond in the methyl ester of 1-methylcyclopropene-3-carboxylic acid with the formation of esters of thio-substituted cyclopropanecarboxylic acids in 67–72% yield.
Autor:
M. N. Protopopova, A. M. Gal'minas
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 40:1106-1107
Methyl cyclopropenecarboxylate (I) enters into the ene reaction with the cyclic acetylene (II), giving vinylcyclopropene (III) with a high yield.
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 37:2114-2118
1. Methyl 1-alkylcycloprop-3-enoates have been shown to add phenol and 4-nitrophenol in the presence of 5–100 mole% of CuCl·2MeC≡CSiMe3 at the C2-C3 bond with opening of the three-membered ring and the formation of 30–80% of the corresponding
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:2225-2228
Terminal acetylenes and HCN in the presence of CuCl add regioselectively as CH-acids to the unsaturated three-membered ring of methyl esters of 1-alkylcyclopropene-3-carboxylic acids to form the methyl esters of the corresponding 3-alken-5-ynoic acid
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 34:576-583
1. The ability of methyl esters of 1-alkylcyclopropene-3-carboxylic acids to cyclopropanate norbornadiene or dicyclopentadiene, in the presence of copper (I) chloride or its complexes, with the formation in up to 75% yield of the corresponding vinylc
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 37:683-688
1. It has been observed for the first time that methyl 1-alkylcyclopropene-3-carboxy-lates in the presence of 5–10 mole % of CuCl or the complex CuCl·2MeC≡CSiMe3 add hydrogen halides (HCl and HBr) and carboxylic acids with pKa values of 3–7 (m
Publikováno v:
Chemischer Informationsdienst. 17
Die Alkylcyclopropencarbonsaureester (I) addieren die Alkine (IIa) bzw. Blausaure (IIb) unter Kupferkatalyse zu den Addukten (III), daneben entstehen die Butensaureester (IV) und die Methoxyfurane (V).