“…Terminal (cyclo)alkyl alkynes provided additional products 3-13 in good yield, whereas the reaction with aryl alkynes resulted in near-quantitative yield, regardless of the steric and electronic properties of the substituents (14-29), with the possible exception of 4-nitrophenylacetylene (23, 75%). Equally productive were a naphthyl and two thienyl alkynes (30)(31)(32). A conjugated enyne was chemoselectively converted into product 33 with the alkene moiety untouched; however, alkynes featuring functional groups sensitive to acetyl chloride (hydroxyl, amino, carboxyl, amide) required the use of preformed sul nyl sulfone 1 (12, 13, 27, and 28).…”