Selective 1,4-arylsulfonation of 1,3-enynes via photoredox/nickel dual catalysis

A photoredox/nickel-catalyzed selective 1,4-arylsulfonation of 1,3-enynes to access structurally diverse sulfone-containing allenes has been established.This radical cascade transformation featured easy manipulation,mild conditions,low catalyst loading,broad substrate scope,and large-scale synthesis.The preliminary mechanistic studies indicated a possible radical-relay process enabled by the radical capture of nickel(0)species.