transylidations of bromonium to iodonium ylides probably involve generation of a reactive carbene :C(SO2CF3)2, being electrophilic in nature. Compared to the bromonium and iodonium ylides, the chloronium ylide serves as a much better progenitor for generation of carbenes (or carbenoids) and efficiently undergoes cyclopropanation of olefins such as cyclooctadiene under uncatalyzed thermal conditions.
开发了在热和催化(
醋酸铑(II))条件下卤鎓叶立德之间的分子间转移,这使得合成迄今为止未知的脂肪族
氯鎓叶立德以及各种
溴鎓和
碘鎓叶立德成为可能。
溴鎓到
碘鎓叶立德的未催化热转移可能涉及反应性卡宾的生成:C(SO2CF3)2,本质上是亲电子的。与
溴鎓和
碘鎓叶立德相比,
氯鎓叶立德是生成卡宾(或类卡宾)的更好的前体,并在未催化的热条件下有效地进行烯烃(如
环辛二烯)的
环丙烷化。