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Abstract
Herein, we disclose an efficient 3-component metal-free carbosulfonylation of alkynes with readily available alkyl carboxylic acids and arylsulfinates under visible light irradiation. This photochemical approach offers a broad substrate scope of highly functionalized alkyl sulfones under mild reaction conditions and without additives. Moreover, in this protocol we employ feedstock chemicals as starting materials and moderate diastereoselectivity is displayed. The utility of our methodology is highlighted by its application in the synthesis of sedum alkaloids. Mechanistic investigations into this transformation are described.
