Synthesis of monohalocyclopropane derivatives from olefins by the reaction with trihalomethanes and copper
作者:Nariyoshi Kawabata、Masami Tanimoto、Shigehiro Fujiwara
DOI:10.1016/0040-4020(79)85049-8
日期:1979.1
bromo-, and iodocyclopropane derivatives were obtained in 10–80% yields by the reaction of FCHI2, ClCHI2, BrCHI2, and CHI3, respectively, with Cu in the presence of olefins. The reaction was electrophilic, and proceeded stereospecifically, i.e., cis and trans olefins afforded cyclopropane derivatives whose configurations with respect to the substituents from original olefins were cis and trans, respectively
在烯烃存在下,通过FCHI 2,ClCHI 2,BrCHI 2和CHI 3分别与Cu反应,可以以10-80%的产率获得氟代,氯代,溴代和碘代环丙烷衍生物。该反应是亲电的,并且立体定向地进行,即,顺式和反式烯烃提供环丙烷衍生物,其相对于来自原始烯烃的取代基的构型为顺式和反式。, 分别。由于在反应混合物中未检测到异构烯烃,这是通过将相应的游离单卤代碳烯插入CH键所预期的,因此该反应似乎是通过有机铜中间体而不是游离的单卤代碳烯进行的。关于通过新反应引入的卤素的构型,通常主要在相应的反式或外型异构体上获得顺式或内式异构体。