ChemInform Abstract: Mechanistic Aspects of Asymmetric Hydroformylation of Olefins Catalyzed by Chiral Phosphine-Phosphite-Rhodium(I) Complexes.

✍ Scribed by T. HORIUCHI; E. SHIRAKAWA; K. NOZAKI; H. TAKAYA

• Publisher: John Wiley and Sons
• Year: 2010
• Weight: 30 KB
• Volume: 28
• Category: Article
• ISSN: 0931-7597
• DOI: 10.1002/chin.199741091

✦ Synopsis

Mechanistic Aspects of Asymmetric Hydroformylation of Olefins

Catalyzed by Chiral Phosphine-Phosphite-Rhodium(I) Complexes.

-The effects of the partial pressure of CO (II) and H2 on the reaction rate and selectivity of the asymmetric hydroformylation of 1-hexene ( Ia) and styrene (Ib) are examined employing the depicted catalyst system in a typical reaction. For both substrates (I) the higher CO partial pressure inhibits the reaction, whereas the partial pressure of H2 hardly effects the reaction rate. In most cases, no severe change in the regio-and enantioselectivity is observed by varying the H2 and CO pressure. It is shown that the regio-and enantioselectivity of this hydroformylation is controlled by an olefin-insertion step. -(HORIUCHI, T.;