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Asymmetric Reduction of Ketones by Phosphoric Acid Derived Catalysts

✍ Scribed by Dr. Zuhui Zhang; Pankaj Jain; Prof. Dr. Jon C. Antilla


Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
375 KB
Volume
123
Category
Article
ISSN
0044-8249

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✦ Synopsis


We thank the National Institutes of Health (NIH GM-082935) and the National Science Foundation CAREER program (NSF-0847108) for financial support. We also thank the referees very valuable suggustions.


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Reductions performed with Ti(IV) complexes of ligands based on bicyclo[2.2.2]octane diols 5 and 6 are effective catalysts in the reduction of prochiral ketones to optically active alcohols, with catecholborane as the reducing agent. Methyl ketones are favored and enantiomeric excesses (ee) of < or =