Substrate Scope of the alkynes^a,b.

^aReaction conditions unless otherwise specified: 0.32 mmol of 1, 2 (1 eq.), 0.5 mol% of [Cp*RhCl₂]₂, 1.5 eq. of AgOOCCF₃, 1 eq. of Cu(OAc)₂, 3 mL of ethanol, 10 min.

^bIsolated yield.