Radical-mediated sulfonylation relay of alkyl alkynes/alkenes and electron-deficient alkenes to access vinyl and alkyl sulfones

A radical-mediated sulfonylation relay of alkyl alkynes/alkenes with electron-deficient alkenes using Na₂S₂O₄ as a linker is developed to synthesize highly selective (Z)-vinyl and alkyl sulfones under a metal-free catalyzed system.