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

S-1, Ar-type reactions of various heterocycles with ortho-substituted (1'S,P)-tricarbonyl[(1-chloroethyl)-eta (6)-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-eta (6)-((2-P,P-diphenylphosphino)phenyl)-chromium(0))ethyl] furan and thiophene show high activity and enantioselectivity in the Pd-catalyzed hydrosilylation of styrenes. (C) 2001 Published by Elsevier Science Ltd.