CATALYTIC ASYMMETRIC HYDROSILYLATION OF CONJUGATED DIENES - EFFECTIVECONTROL OF REGIOSELECTIVITIES AND ENANTIOSELECTIVITIES

Hydrosilylation of (E)-1-phenyl-1,3-butadiene with HSiPh(n)X(3-n) (X = Cl, F; n = 1, 2) was catalyzed by palladium catalyst generated in sit u from (eta(3)-C3H5PdCl)(2) and (R)-2-diphenylphosphino-1,1'-binaphthy l derivatives (2), giving optically active (Z)-1-phenyl-1-silyl-2-bute nes (1) in good yields. The regio- and enantioselectivities of the rea ction was found to be strongly affected by the structure of the hydros ilane and the phosphine ligand.