Substitution of both chloro and sulfinyl groups of aryl 1-chlorocyclopropyl sulfoxides in one-pot via cyclopropylmagnesium carbenoids: a synthesis of multi-substituted cyclopropanes
作者:Masanobu Yajima、Ryo Nonaka、Hironori Yamashita、Tsuyoshi Satoh
DOI:10.1016/j.tetlet.2009.06.019
日期:2009.8
The rearrangement of cyclopropylmagnesium carbenoids, which were generated from aryl 1-chlorocyclopropyl sulfoxides with a Grignard reagent, to allenes was found to be suppressed by adding HMPA as an additive. Alkylation of the cyclopropylmagnesium carbenoids with the Grignard reagent gives mainly alkylated cyclopropylmagnesium chloride instead. The cyclopropylmagnesium chloride intermediate can be
发现通过添加HMPA作为添加剂可以抑制由芳基1-氯环丙基亚砜与格氏试剂生成的环丙基镁类胡萝卜素重排至丙二烯。用格氏试剂将环丙基镁类化合物烷基化,主要得到的是烷基化的环丙基氯化镁。环丙基氯化镁中间体可以用几种亲电试剂捕集,得到多取代的环丙烷。该程序提供了一种合成多取代环丙烷的新方法。