In organic synthesis, cyclopropanation reactions are often performed with Simmons–Smith-type reagents or by transition metal catalyzed reactions of olefins with diazo compounds. A novel method for the synthesis of substituted cyclopropanes is described that is based on a two-step
reaction sequence. Olefins are reacted with 1,1'-dichlorides in a Ru-catalyzed atom transfer radical addition (ATRA) process and the resulting 1,3-dichlorides are directly converted into cyclopropanes by reductive coupling with magnesium. This one-pot procedure is applicable to a variety of
substrates and can be performed in an inter- or intramolecular fashion.
在有机合成中,环丙烷化反应通常使用Simmons-Smith类型试剂进行,或者通过过渡金属催化的烯烃与重氮化合物的反应进行。描述了一种基于两步反应序列的合成取代环丙烷的新方法。烯烃通过Ru催化的原子转移自由基加成(ATRA)过程与1,1'-二氯化物反应,生成的1,3-二氯化物通过与镁的还原偶联直接转化为环丙烷。这种一锅法适用于各种底物,并可以以分子间或分子内的方式进行。