<i>vic</i>-Diphosphination of Alkenes with Silylphosphine under Visible-Light-Promoted Photoredox Catalysis

An Ir­(ppy)₃-catalyzed <i>vic</i>-diphosphination of styrenes with Me₃Si-PPh₂ and NFSI proceeds under blue LED irradiation to afford the corresponding bis­(diphenyl­phos­phino)­ethane derivatives without any formation of hydrophosphination byproducts, which are inevitable and problematic under the previous Cu/NHC catalysis. Additionally, the visible-light-promoted photoredox catalysis enables the diphosphination of relatively challenging aliphatic alkenes and β-substituted styrene.