Enantioselective Hydrogenations on Platinum Colloids
- 20 September 1996
- journal article
- research article
- Published by Wiley in Angewandte Chemie International Edition in English
- Vol. 35 (17) , 1992-1995
- https://doi.org/10.1002/anie.199619921
Abstract
The chemical reduction of aqueous solutions of platinum salts in the presence of the alkaloid dihydrocinchonidine yields chirally coated platinum colloids. The particle sizes can be varied in a controlled fashion from 1.5 to 4 nm by changing the alkaloid concentration. These chirally coated platinum colloids function in quasi‐homogenous phases as enantioselective hydrogenation catalysts for ethylpyruvate (76% ee), and no structure sensitivity was observed.Keywords
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