Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus esters
Patent
1997-02-24
1998-05-26
Geist, Gary
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus esters
556136, C07F 928
Patent
active
057567999
ABSTRACT:
New optically active phosphinite compounds which are useful in asymmetric catalysis have been synthesized and have been used in the preparation of rhodium catalysts. Such catalysts are particularly useful in enantioselective catalytic hydrogenation reactions.
REFERENCES:
CA:112:985158 abs of "Asymmetric hydrogenation of alpha arylpropenoic acids catalyzed by rhodium I complexes of chiral ligands derived from soome monosaccharides", Sunjic, Gazz Chim Ital, 119(4) pp. 229-233, 1989.
CA:97:92397 abs of "Synthesis, conformational studies and enantioselective homogeneous catalytic hydrogenation with CRC-PHOS and some congeners", Comisso, Croat Chem Acta, 54(3), pp. 375-397, 1981.
Grubbs, Robert H. and Robert A. DeVries. "Asymmetric Hydro-Genation by an Atropisomeric Diphosphinite Rhodium Complex." Tetrahedron Letters No. 22 (1977) Pergamon Press. pp. 1879-1880.
Bakos, Jozsef, et al. "Use of Heterogeneous Asymmetric Hydro-genation for the Preparation of a Chiral Phosphinite and Its Application as a Ligand in Homogeneous Asymmetric Hydrogenation" J. Org. Chem. 46 (1981), 5427-5428.
Bakos, Jozsef, et al. "Asymmetric Hydrogenation Using Chiral Phosphinite Rhodium Complexes." Tetrahedron Letters vol. 25, No. 43 (1984) Pergamon Press. pp. 4965-4966.
Selke, R. and H. Pracejus. "Phosphinites of Carbohydrates as Chiral Ligands for Asymmetric Synthesis Catalysed by Complexes Part II: Superiority of Phenyl 4,6-O-(R)-Benzylidene-2,3-O-Bis(Diphenylphosphino)-.beta.-D-Glucopyyranosi de for Rhodium(I)--Catalysed Hydrogenation of Amino Acid Precursors." Journal of Molecular Catalysis 37 (1986) 213-225.
Nieman, James A., et al. "An Improved Synthesis and Resolution of No. 9(1993) Pergamon Press 1973-1976.
Chan Albert Sun-Chi
Hu Wen-Hao
Jiang Yao-Zhong
Mi Ai-Qiao
Yan Ming
Geist Gary
The Hong Kong Polytechnic University
Vollano Jean F.
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