Les radicaux phenylthiyle et phenylselenyle catalysent l'oxygenation devinyl-1 cyclopropanes comportant un取代基 phenyle,vinyle, ou 酯 en 2 位, ou un groupe alleen en 1' du groupe 乙烯基, 浇注 donner les dioxolannes-1,2 对应物。分析立体化学和区域化学反应
Vinylcyclopentene synthesis via phenylthio radical catalyzed addition of electron deficient alkynes to substituted vinylcyclopropanes
作者:Ken S Feldman、Robert E Ruckle、Anthony L Romanelli
DOI:10.1016/s0040-4039(01)93486-0
日期:1989.1
Treatment of either t-butyl ester- or benzylether-substituted vinylcyclopropanes with an excess of ester- or sulfone-bearing alkynes in the presence of phenylthioradical in benzene afforded moderate yields of functionalized vinylcyclopentene products as mixtures of stereoisomers.
Intra- and intermolecular Fe-catalyzed dicarbofunctionalization of vinyl cyclopropanes
作者:Lei Liu、Wes Lee、Mingbin Yuan、Chris Acha、Michael B. Geherty、Brandon Williams、Osvaldo Gutierrez
DOI:10.1039/d0sc00467g
日期:——
halides and arylGrignardreagents has been realized via a mechanistically driven approach. Mechanistic studies support the diffusion of alkyl radical intermediates out of the solvent cage to participate in an intra- or intermolecular radical cascade with a range of VCPs followed by re-entering the Fe radical cross-coupling cycle to undergo (stereo)selective C(sp2)–C(sp3) bondformation. This work provides
Cyclopentane synthesis via free radical mediated addition of functionalized alkenes to substituted vinyl cyclopropanes
作者:Ken S. Feldman、Anthony L. Romanelli、Robert E. Ruckle、Raymond F. Miller
DOI:10.1021/ja00218a050
日期:1988.5
Nouvelle strategie de synthese de cyclopentanes fonctionnalises grâce a l'addition catalysee par un radical phenylthiyle d'alcenes substitues sur des cyclopropanes vinyliques substitues
Nouvelle strategie de synthese de cyclopentanes fonctionnalises grâce a l'addition catalysee par un Radical phenylthiyle d'alcenes substitues sur des cyclopropanesvinyliques substitues
Vinylcyclopentane synthesis via phenylthio radical catalyzed alkenylation of vinylcyclopropanes: preparative and mechanistic studies
作者:Ken S. Feldman、Anthony L. Romanelli、Robert E. Ruckle、Ginette Jean
DOI:10.1021/jo00027a020
日期:1992.1
1-Vinylcyclopropanes bearing ether or ester substituents at C(2) of the cyclopropyl ring or alkyl groups at other ring (or alkenyl) positions were subjected to PhS. catalyzed olefination with ester- or oxygen-functionalized alkenes. In some instances, variations in reaction conditions (low temperature, Lewis acids) led to levels of stereoselectivity unprecedented in such simple, unbiased substrates. In general, the stereochemical outcome of these transformations can be rationalized by citing existing models for selectivity upon cyclization of substituted 5-hexenyl radicals. However, in a few specific instances, results obtained with alkylated vinylcyclopropyl substrates are not consistent with some of the predictions of these models.
FELDMAN, KEN S.;ROMANELLI, ANTHONY L.;RUCKLE, ROBERT E. (JR);MILLER, RAYM+, J. AMER. CHEM. SOC., 110,(1988) N 10, C. 3300-3302
作者:FELDMAN, KEN S.、ROMANELLI, ANTHONY L.、RUCKLE, ROBERT E. (JR)、MILLER, RAYM+