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US 5,488,172 AGranted
Chiral phosphorus compounds
AssigneeHoffmann-La Roche Inc.
InventorsMarco Cereghetti, Joseph Foricher, Bernd Heiser, Rudolf Schmid
Life of this patent
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Abstract
Novel chiral phosphorus compounds of the formula ##STR1## wherein R signifies lower alkyl, R.sup.1 signifies phenyl and R.sup.2 and R.sup.3 signify hydrogen or lower alkoxy, which are suitable in the form of complexes with a metal of Group VIII as catalysts for asymmetric hydrogenations and for enantioselective hydrogen displacements in prochiral allylic systems.
Claims15
A chiral phosphorous compound of the formula:
- ##STR11## wherein R.sup.1 is phenyl or lower alkyl-substituted phenyl, and R.sup.2 and R.sup.3 are hydrogen or methoxy;
- which compound are in the (R)- or (S)-form.
Dependencies are inferred from the claim text.