X=Y-ZH Systems as potential 1.3-dipoles. part 16. cyclopropyl substituted azomethine ylides as mechanistic probes in 1.3-dipolar cycloaddition reactions
作者:Ronald Grigg、P.Armstrong William
DOI:10.1016/s0040-4020(01)85931-7
日期:1988.1
the 1,2-prototropic route and the decarboxylative route to azomethine ylides were studied with cyclopropyl substituents located on one or both carbon atoms of the azomethine ylides and in several instances in the dipolarophile. Cycloadducts were obtained in good yield with no evidence of biradical intermediates, i.e. no products arising from cyclopropyl radical ⇀ but-3-enyl radical rearrangements were
用位于偶氮甲胺基团的一个或两个碳原子上的环丙基取代基和在偶极亲子基团中的几种情况下,研究了涉及1,2-质子化途径和脱羧途径的环加成反应。未获得双自由基中间体的证据,即获得了高收率的环戊二烯,即未检测到由环丙基自由基⇀But-3-enyl自由基重排产生的产物。