Sulfur-Mediated Difunctionalization of Internal and Terminal Alkynes for the Synthesis of α-Acetoxy Ketones

Abstract The sulfur-mediated difunctionalization of alkynes is reported to give α-acetoxy ketones in a one-pot operation under mild conditions with 19-92% yield. By using wet potassium acetate as both the aqueous base and nucleophilic reagent, both terminal alkynes and internal alkynes could be converted into the α-acetoxy ketone products.