Reaction of non-activated olefins with CH-acids; a novel method for the preparation of electrophilic cyclopropanes
作者:László Tóke、Gábor T Szabó、Zoltán Hell、Gábor Tóth
DOI:10.1016/s0040-4039(00)88529-9
日期:1990.1
Reaction of non-activated olefines with active methylene compounds was accomplished under solid-liquid phase-transfer conditions, in the presence of iodine, to give electrophiliccyclopropanes of a wide range of substituents. Several data to the mechanism of the reaction are also given.
Stereoselective Gold(I) Domino Catalysis of Allylic Isomerization and Olefin Cyclopropanation: Mechanistic Studies
作者:Sebastian Klimczyk、Xueliang Huang、Hanspeter Kählig、Luís F. Veiros、Nuno Maulide
DOI:10.1021/acs.joc.5b00666
日期:2015.6.5
Gold(I) catalysis of olefin activation is still a rare feature in the repertoire of that metal. Mechanistic studies on the gold(I)-catalyzedcyclopropanation of allyl-substituted sulfonium ylides, including kinetic analysis as well as detailed computational studies, reveal that the reaction proceeds through activation of the alkene moiety. Furthermore, a novel competitive allylic isomerization pathway