Regio- and Diastereoselective Cu-Mediated Trifluoromethylation of Functionalized Alkenes
摘要:
alpha- and beta-substituted N,N-diethylacrylamides undergo copper-mediated direct beta-trifluoromethylation. The amide moiety acts as a directing group for the regio- and the stereo-controlled introduction of the trifluoromethyl group. The reaction is carried out under acidic conditions in the presence of Umemoto's reagent. This method does not require prefunctionalized substrates and delivers excellent stereoselectivity.
Electrochemical Difluoromethylation of Electron‐Deficient Alkenes
作者:He‐Huan Xu、Jinshuai Song、Hai‐Chao Xu
DOI:10.1002/cssc.201803058
日期:2019.7.5
Electrochemical 1,2‐hydroxydifluoromethylation and C−H difluoromethylation of acrylamides were developed by using CF2HSO2NHNHBoc as the source of the CF2H group. These electricity‐powered oxidative alkene functionalization reactions do not need transition‐metal catalysts or chemical oxidants. The reaction outcome, 1,2‐difuntionalization or C−H functionalization, is determined by the substituents on
alpha- and beta-substituted N,N-diethylacrylamides undergo copper-mediated direct beta-trifluoromethylation. The amide moiety acts as a directing group for the regio- and the stereo-controlled introduction of the trifluoromethyl group. The reaction is carried out under acidic conditions in the presence of Umemoto's reagent. This method does not require prefunctionalized substrates and delivers excellent stereoselectivity.