Bidentate planar chiral η6-arene tricarbonyl chromium(0) complexes: ligands for catalytic asymmetric alkene hydrosilylation

SEAr-type reactions of various heterocycles with ortho-substituted (1′S,P)-tricarbonyl[(1-chloroethyl)-η6-benzene]chromium(0) derivatives lead to a family of novel planar chiral bidentate and pseudo-bidentate ligands. Two members of this family (1′S,P)-2-[1′-tricarbonyl-η6-((2″-P,P-diphenylphosphino)phenyl)-chromium(0))ethyl] furan and thiophene show high activity and enantioselectivity in the Pd-catalyzed hydrosilylation of styrenes.