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Synthesis of Dinuclear Complexes Bearing Metalloporphyrin−Phosphine Hybrid Ligands and Their Catalytic Activity toward Hydrosilylation of Ketones

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posted on 16.08.2004, 00:00 by Makoto Saito, Yoshiaki Nishibayashi, Sakae Uemura
A new type of metalloporphyrin−phosphine hybrid ligand (1) has been designed and synthesized. Reactions of some transition metal complexes such as PdCl2, PtCl2, and [RhCl(CO)2]2 with a zinc porphyrin−phosphine ligand (1; M1 = Zn) afford the corresponding dinuclear complexes (2) bearing the hybrid ligand. The zinc porphyrin−phosphine compound (1; M1 = Zn, R = Ph) has been found to work as an effective ligand for Rh(I)- or Ir(I)-catalyzed hydrosilylation of ketones to give the corresponding alcohols after acid hydrolysis.