Chiral ligands for asymmetric catalysis
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United States of America Patent
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Jan 21, 2003
Grant Date -
Mar 21, 2002
app pub date -
Jun 4, 2001
filing date -
Jun 2, 2000
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Expired
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Abstract
A novel phosphine ligand is an enantiomerically enriched compound of formula 5 ##STR1## or the opposite enantiomer thereof, wherein Ar.sup.1 and Ar.sup.2 represent the same or different aromatic groups of up to 20 C atoms. A transition metal complex of this ligand is useful as a catalyst in stereoselective hydrogenation.
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