Catalytic Enantioselective Synthesis of Highly Functionalized Difluoromethylated Cyclopropanes
作者:Maxence Bos、Wei-Sheng Huang、Thomas Poisson、Xavier Pannecoucke、André B. Charette、Philippe Jubault
DOI:10.1002/anie.201707375
日期:2017.10.16
The first catalytic asymmetric synthesis of highly functionalized difluoromethylated cyclopropanes is described. The method, based on a rhodium‐catalyzed cyclopropanation of difluoromethylated olefins, gives access to a broad range of cyclopropanes bearing ester, ketone, or nitro functional groups. By using Rh2((S)‐BTPCP)4 as a catalyst, the corresponding products were obtained in high yields and high
描述了高度官能化的二氟甲基化的环丙烷的第一催化不对称合成。该方法基于铑催化的二氟甲基化烯烃的环丙烷化作用,可使用各种带有酯,酮或硝基官能团的环丙烷。通过使用Rh 2((S)-BTPCP)4作为催化剂,可以以高收率和高非对映和对映选择性(高达20:1 dr和99%ee)获得相应的产物。该方法学允许首次制备对映体富集的二氟甲基环丙烷。