Visible-Light-Induced Nickel-Catalyzed P(O)-C(Sp(2)) Coupling Using Thioxanthen-9-One As A Photoredox Catalysis

An efficient method has been developed for photocatalytic P(O)-C(sp(2)) coupling of (hetero)aryl halides with H-phosphine oxides or H-phosphites under the irradiation of visible light or sunlight. The thioxanthen-9-one/nickel dual catalysis mediates this phosphonylation to give arylphosphine oxides and arylphosphonates in moderate to excellent yields. This transformation is widely tolerant to a range of functional groups and proceeds efficiently on a gram scale.