Chiral Diphosphonites as Ligands in the Ruthenium-Catalyzed Enantioselective Reduction of Ketones, B-Ketoesters and Ketimines
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United States of America Patent
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Issued Date -
Oct 16, 2008
app pub date -
May 30, 2006
filing date -
Jun 2, 2005
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Abandoned
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Abstract
Chiral ruthenium complexes are disclosed, obtained by reaction of a ruthenium salt with a chiral diphosphonite. Chiral diols with the general structure given in scheme 1 are preferably used as chiral diphosphonites. Said ruthenium complexes can be simply and economically obtained and provide high enantioselectivity on reduction of ketones, .beta.-ketoesters and ketimines.
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