An efficient one-pot green strategy hasb een developed for the synthesiso fb-ketosulfones by directly using easily availableand inexpensive sulfonyl chlorides as as ulfur source to react with aromatic alkenes in the presence of cheap tert-butyl hydroperoxide (TBHP) and Et 3 Ni n 1,2-dichloroethane (DCE) at 45 8Cwithin 3h.Scheme1.Comparision of previousw ork with this study.

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An efficient and practical one‐pot strategy for the synthesis of N‐sulfonylformamidines was developed by directly using easily available sulfonyl chlorides, sodium azide and tertiary/secondary amines in the presence of 5 mol‐% CuBr2 under aerobic oxidative conditions.

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