Copper-Catalyzed Intramolecular Trifluoromethylation of N-Benzylacrylamides Coupled with Dearomatization: Access to CF3-Containing 2-Azaspiro[4.5]decanes

Copper-catalyzed intramolecular trifluoromethylation of N-benzylacrylamides coupled with dearomatization was achieved and used to regiospecifically construct a variety of trifluoromethylated 2-azaspiro[4.5]decanes bearing adjacent quaternary stereocenters under mild conditions in moderate to excellent yields.