Process for enantioselective hydrogenation of the oxo C.dbd.O double bond
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United States of America Patent
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Mar 25, 1997
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N/A
app pub date -
Mar 9, 1995
filing date -
Jul 2, 1992
priority date (Note) -
Expired
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Abstract
The present invention concerns a process for enantioselective catalytic hydrogenation of the ketone C.dbd.O double bond to a secondary alcohol function, said process using a neutral ruthenium complex as the catalyst and a compound containing a C.dbd.O group as the substrate to be hydrogenated, characterised in that it comprises hydrogenation of the substrate using a diallyl (diphosphino) ruthenium compound with formula ##STR1## where al preferably represents CH.sub.2 CH.dbd.CH.sub.2 or CH.sub.2 C(CH.sub.3).dbd.CH.sub.2, Q represents a hydrocarbon bridge containing at least two catenary carbon atoms and which can contain one to four catenary heteroatoms selected from O, S, N and Si, R.sup.1 to R.sup.4 may be identical or different and each represents a C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.7 cycloalkyl or C.sub.6 -C.sub.12 aryl group.
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