K. Nozaki et al., ENANTIOSELECTIVE HYDROFORMYLATION OF OLEFINS CATALYZED BY RHODIUM(I) COMPLEXES OF CHIRAL PHOSPHINE-PHOSPHITE LIGANDS, Topics in catalysis, 4(3-4), 1997, pp. 175-185
Using Rh(I) complexes of chiral phosphine-phosphites, hydroformylation
of such a variety of olefins as aryl-substituted, alkyl-substituted,
and heteroatom-substituted ones proceeded in high enantioselectivity.
A trigonal bipyramidal RhH(CO)(2)(phosphine-phosphite) complex is sugg
ested as the active species, in which the hydride and the phosphite mo
iety are located at the apical positions.