Reduction of phosphine oxides to the corresponding phosphine derivatives in Mg/Me₃SiCl/DMI system

Direct reductions of phosphine oxides to the corresponding phosphines were performed successfully by using Mg/Me₃SiCl/DMI system. The reduction proceeded under mild conditions and was applicable to a wide range of phosphine oxides; triarylphosphine oxides, alkyldiarylphosphine oxides, and dialkylarylphosphine oxides gave the corresponding phosphines in good to excellent yields.