The halogen atom of the title carbenoids is susceptible to displacement by butyllithium. 1-Butyl-1-lithiocyclopropanes are formed, in which the butyl group occupies the less hindered site trans or exo position). The new reaction provides a means for the preparation of geminally disubstituted cyclopropanes with high degree of stereoselectivity.
标题碳氢化合物的卤原子容易被丁基
锂置换。形成了 1-丁基-1-
硫代
环丙烷,其中的丁基占据了反式或外式位置上受阻较小的位点)。这种新反应为制备具有高度立体选择性的宝石二取代
环丙烷提供了一种方法。