Palladium-catalysed asymmetric hydrosilylation of styrenes with a new chiral monodentate phosphine ligand

Abstract

Asymmetric hydrosilylation of styrenes (ArCHCHR) with trichlorosilane in the presence of a palladium catalyst (0.1 mol%) bearing a new chiral monodentate phosphine ligand, (S)-2-diphenylphosphino-1,1′-binaphthyl [(S)-H-MOP], followed by oxidation of the resulting 1-aryl-1-silylalkanes, gives optically active benzylic alcohols of up to 96% enantiomeric excess (e.e.).