Facile preparation of cyclopropanes from 2-iodoethyl-substituted olefins and 1,3-dihalopropanes with zinc powder
作者:Daisuke Sakuma、Hideo Togo
DOI:10.1016/j.tet.2005.07.103
日期:2005.10
Two efficient, simple, cheap, and environmentally benign preparations of cyclopropanes were achieved. One is the formation via 3-exo-trig manner from various electron-deficient 2-iodoethyl-substituted olefins with zinc powder in a mixture of t-butyl alcohol and water, and the other is the formation via 3-exo-tet manner from various 1,3-dihalopropanes with zinc powder in ethanol.
实现了两种高效,简单,廉价且对环境无害的环丙烷制备方法。一个是通过3-形成外切-三角函数中的混合物从与锌粉各种缺电子2-碘乙基-取代的烯烃的方式吨丁基醇和水,另一种是通过3-形成外切- TET从方式各种1,3-二卤丙烷与锌粉的乙醇溶液。