Bench-Stable 5‑Stannyl Triazoles by a Copper(I)-Catalyzed Interrupted Click Reaction: Bridge to Trifluoro­methyl­triazoles and Trifluoro­methyl­thiotriazoles

Metalated triazoles are the key reactive intermediate of the current click reaction (CuAAC). Bench-stable 5-stannyl triazoles are obtained by a copper-catalyzed interrupted click reaction of easily available terminal alkynes. Subsequent palladium-catalyzed cross-coupling reactions, electrophilic trifluoro­methylthiolation and trifluoromethylation, generate diverse 1,4,5-trisubstituted triazoles efficiently, which the traditional click reaction is unable to do.