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Substrate-controlled adsorption of cinchonidine during enantioselective hydrogenation on platinum

✍ Scribed by Erik Schmidt; Tamas Mallat; Alfons Baiker

Book ID
113686839
Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
483 KB
Volume
272
Category
Article
ISSN
0021-9517

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Substrate adsorption on the cinchonidine
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Two regioisomeric ␣-phenyl-␀-pyridylacrylic acids were hydrogenated with cinchonidine (CD)-modified Pd/C. The low ee obtained was attributed to the strong adsorption of the substrate, which caused desorption of CD from the catalyst surface. The ee was improved at the low substrate/CD ratio up to 82%

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