59. Copper-Catalyzed Highly Stereospecific Trifluoromethylation and Difluoroalkylation of Secondary Propargyl Sulfonates 

Xing Gao, Yu-Lan Xiao, Xiaolong Wan, and Xingang Zhang*

 Angew. Chem. Int. Ed. 2018, 57, 3187-3191