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- W1988691816 abstract "Abstract The asymmetric hydrogenation of α-diketones was investigated over finely dispersed polymer-stabilized and supported platinum clusters. It was shown that the rate-accelerating effect of cinchonidine in this reaction was much less pronounced than the case of Pt/cinchona/α-ketoester system. The activity and enantiomeric excess (e.e.) for 3-hydroxy-2-butanone reached maximum when the molar ratio of the modifier to reactant was about 1:650. There was no close correlation between the catalytic performance of the platinum clusters and the polarity of the solvents, whereas good enantioselectivity (>40%) as well as activity could be obtained in a mixture of dichloromethane and ethanol." @default.
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- W1988691816 date "2000-06-01" @default.
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- W1988691816 title "Asymmetric hydrogenation of α-diketones over polymer-stabilized and supported platinum clusters" @default.
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