Zobrazeno 1 - 10 of 20 pro vyhledávání: '"R. G. Karpenko"'
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Reactions of arylsulfonyl compounds with excess organolithium reagent. 15. Formation of o-lithiumarynes by metalation of benzene-series sulfonic acid derivatives
Autor: F. M. Stoyanovich, R. G. Karpenko, M. A. Marakatkina, Ya. L. Gol'dfarb
Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 29:129-135
When treated with excess organolithium reagent, the sulfo group in the esters, amides, and salts of benzene-series sulfonic acids, like the sulfonyl group in t-butyl aryl sulfones, undergoes substitution by a lithiumaryne mechanism via the intermedia
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9593264c0249987f47fb6f054ac9d0d8
https://doi.org/10.1007/bf00951894
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5
Reactions of arylsulfonyl compounds with an excess of an organolithium reagent 14. The action of organolithium reagents on tert-butyl pyridinyl sulfones
Autor: M. A. Marakatkina, F. M. Stoyanovich, Ya. L. Gol'dfarb, R. G. Karpenko
Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 27:2469-2473
1. The tert-butyl sulfonyl groups in tert-butyl pyridin-2-yl and pyridin-4-yl sulfones are replaced by butyl groups under the action of BuLi predominantly by the AEn mechanism, and in the case of tert-butyl pryidin-4-yl sulfone also partially by the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::267a4860f0cd984364ffc84ce0dd76da
https://doi.org/10.1007/bf00941098
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6
Reaction of aromatic sulfonyl compounds with excess organolithium reagent
Autor: F. M. Stoyanovich, Ya. L. Gol'dfarb, G. B. Chermanova, R. G. Karpenko
Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 25:1503-1508
1. p-Bis(tert-butylsulfonyl)benzene (I) and 2,5-bis(tert-butylsulfonyl)thiophene (II) when treated with n-BuLi are capable of replacing one of the sulfonyl groups by the n-butyl group. 2. The conditions were found where sulfone (II) is metalated in t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2c937503df8e4e476523bb456f91a9db
https://doi.org/10.1007/bf00920826
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9
Effect of steric factor on electron exchange in paramagnetic derivatives of isophthalic acid
Autor: R. G. Karpenko, V. P. Ivanov, A. B. Shapiro, V. I. Suskina, F. M. Stoyanovich, É. G. Rozantsev
Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 20:579-581
1. The di-2,2,6,6-tetramethyl-1-oxyl-4-hydroxypiperidyl esters of the 2-methyl- and 2-n-butylisophthalic acids, and the di-2,2,6,6-tetramethylpiperidyl-1-oxyl-4-β-hydroxyethyl esters of the isophthalic and 2-n-butylisophthalic acids, were synthesize
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f5de43132d8f42384a09d4262364149
https://doi.org/10.1007/bf00852061
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