Palladium-catalysed enantioselective hydrogenation of alkenoic acids. Roleof isomerization

Authors
Borszeky, K Mallat, T Baiker, A
Citation
K. Borszeky et al., Palladium-catalysed enantioselective hydrogenation of alkenoic acids. Roleof isomerization, CATAL LETT, 59(2-4), 1999, pp. 95-97
Citations number
14
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
CATALYSIS LETTERS
ISSN journal
1011372X → ACNP
Volume
59
Issue
2-4
Year of publication
1999
Pages
95 - 97
Database
ISI
SICI code
1011-372X(1999)59:2-4<95:PEHOAA>2.0.ZU;2-D
Abstract
The enantioselective hydrogenation of 2-ethyl-propenoic acid over Pd/alumin a modified with cinchonidine has been studied. The reaction, carried out in a batch reactor at 1 bar hydrogen pressure and room temperature, revealed that the isomerization of the C=C double bond is a competing side reaction. Double-bond migration and the subsequent hydrogenation of the two isomer a lkenoic acids lowered the enantioselectivity drastically due to the formati on of opposite enantiomers.