M. Arx, T. Mallát, A. Baiker
Dec 1, 1999
Citations
0
Influential Citations
32
Citations
Journal
Journal of Molecular Catalysis A-chemical
Abstract
Abstract The partial hydrogenation of 2,6,6-trimethyl-2-cyclohexen-1,4-dione (ketoisophorone) was studied over alumina-supported Pt and Pd catalysts. The influence of solvent, pressure, catalyst pretreatment, and Lewis acid and base additives was investigated. Chemoselectivities over 90% were achieved in the saturation of the C C or the sterically hindered C O double bonds over Pt and Pd, respectively. This seems to be the first example for the selective reduction of an α,β-unsaturated ketone to an unsaturated alcohol using dihydrogen. Enantioselective hydrogenation of the carbonyl group over cinchonidine-modified Pt afforded only 14% ee.