A copper( ii )-catalyzed aerobic oxidative reaction of arylhydrazines, DABCO·(SO ₂ ) ₂ and alkenes is reported. Diverse β-hydroxysulfones are generated in moderate to good yields through the hydroxysulfonylation of alkenes with the insertion of sulfur dioxide under mild conditions. In some cases, β-ketosulfones are produced.
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Zhang et al. (2019) studied this question.
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