Radical 10, generated from the corresponding imidazolethiocarbonyl derivative 3 or the phenyl selenide 4, rearranges in a six-step process to give the cyclohexene 5, after reduction; this rearrangement sequence includes the selective 5-Exo cyclisation of a (methylenecyclopropyl)propyl radical and opening of the intermediate cyclopropylmethyl radical to give a ring-expanded product.
由相应的
咪唑硫代羰基衍
生物 3 或苯基
硒化物 4 生成的自由基 10 在还原后经过六步重新排列得到
环己烯 5;该重新排列顺序包括(亚甲基环丙基)丙基的选择性 5-Exo 环化和中间环丙基
甲基自由基的开环,从而得到环扩张产物。