Stereoselective syntheses of 3,3-difluoro-1-propene derivatives
摘要:
A highly regio- and stereo-selective introduction of a difluoromethylene group in allylic position is described. The key step is the treatment of 3-acetoxy-1,1-difluoro-1-propenes with Grignard reagents in the presence of copper and lithium salts.