Photo-induced stereo- and regiospecific sulfonylation of C–C multiple bonds exploiting the dual reactivity of sulfonium iodate(i) species

The visible-light-directed stereospecific radical sulfonylation featuring the dual-reactivity of electrophilic reagent Me 3 SI(OAc) 2 is realized for vinyl-sulfonyl functionalization of the C( sp )-H and C( sp 2 )-H π bond in alkynes and alkenes.