Asymmetric Catalytic Hydrogenation of Prochiral Ketones and Aldehydes
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United States of America Patent
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Issued Date -
Apr 23, 2009
app pub date -
Mar 8, 2007
filing date -
Mar 10, 2006
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Abandoned
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Abstract
Process for stereoselective hydrogenation by reacting racemic aldehydes or ketones having a stereogenic carbon atom in the position relative to the C(O) group and containing the structural element —(O)C—C—CH— by means of hydrogen in the presence of a base and a ruthenium complex containing a bidentate ligand having coordinating P and N atoms, a monophosphine ligand and anionic and/or uncharged ligands as homogeneous catalyst, with the charge being balanced by one or two monovalent acid anions or a divalent acid anion when uncharged ligands are present.
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