Abstract
Allyl sulfones are synthesized via Cu-catalyzed ligand-free regioselective sulfonylation reaction from easily obtained α-methylstyrene derivatives and sulfonyl chlorides. This redox-neutral protocol also features a low-cost metal catalyst, broad substrate scope, good functional group tolerance and could be smoothly amplified to a gram scale. The allylic sulfone products can be used in diverse radical coupling reactions.
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