Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Patent
1991-10-10
1993-10-19
Dees, Jose G.
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
556 18, 556136, 560 1, 560 37, 560104, 560105, 560100, 562494, 562495, 562493, 562496, 564161, 564188, 585269, 585277, C07C 6976, C07C22900, C07F 1500
Patent
active
052547140
ABSTRACT:
A process is disclosed for the enantioselective hydrogenation of olefins of the formula: ##STR1## where R is hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl, Z is ##STR2## where R' is hydrogen or C.sub.1 to C.sub.6 linear or branched alkyl, --CN, C(NH)OR" where R" is C.sub.1 to C.sub.6 linear or branched alkyl, or --C(O)NH.sub.2 ; and Ar is phenyl or naphthyl unsubstituted or substituted with benzoyl or substituted benzoyl, C.sub.1 to C.sub.6 linear or branched alkyl, C.sub.1 to C.sub.6 linear or branched alkoxy, halo, or carboxylic acid or C.sub.1 to C.sub.6 linear or branched alkyl ester thereof, which comprises contacting said aromatic-substituted olefin with a catalytically effective amount of a ruthenium phosphite complex.
REFERENCES:
patent: 4517390 (1985-05-01), Russell et al.
patent: 4605758 (1986-08-01), Schloemer
patent: 4707549 (1987-11-01), Fritz et al.
patent: 5118837 (1992-06-01), Chalk et al.
Ohta et al., J. Org. Chem., vol. 52, pp. 3174-3176 (1987).
Dees Jos,e G.
Ethyl Corporation
Hammond Richard J.
Nazario Porfirio
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