An improved method for the efficient copper-mediated trifluoromethylation of terminalalkynes has been developed. This protocol highlights the convenient access to a variety of aryl-substituted trifluoromethylated alkynes by oxidativetrifluoromethylation with two equivalents of TMSCF3 at room temperature.
The copper‐mediated trifluoromethylation of terminal alkynes with S‐(trifluoromethyl)diarylsulfonium salt has been carefully investigated. The reactions proceeded smoothly to afford trifluoromethylated acetylenes in moderate to good yields. This approach is a convenient method to synthesize a variety of functional trifluoromethylated acetylenes.