Merging Transition-Metal Catalysis with Photoredox Catalysis: An Environmentally Friendly Strategy for C–H Functionalization

Transition-metal-catalyzed C–H functionalization is already a useful tool in organic synthesis, whilst the rapid development of photoredox catalysis provides new pathways for C–H functionalization with high selectivity and efficiency under mild reaction conditions. In this review, recent advances in C–H functionalization through merging transition­-metal catalysis with photoredox catalysis are discussed. 1 Introduction 2 Merging Nickel Catalysis with Photoredox Catalysis 3 Merging Palladium Catalysis with Photoredox Catalysis 4 Merging Cobalt Catalysis with Photoredox Catalysis 5 Merging Photoredox Catalysis with Other Transition-Metal Catalysis­ 6 Conclusions