Intermediate enol formation has been registered by deuterium exchange in the hydrogenation products ofα, β-unsaturated ketones on Co/C and Rh/C, indicating 1,4 addition of hydrogen to the enone system.
The presence of 1,4 hydrogen addition toα,β-unsaturated ketones is determined by the nature of the catalyst; Pd/C does not catalyze this process route.
Modification of Pd catalysts with cadmium changes their orienting action and selectivity in favor of 1,4 hydrogen addition with intermediate enol formation.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 817–819, April, 1976.
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Freidlin, L.K., Gvinter, L.I., Zamureenko, V.A. et al. Routes of catalytic hydrogen addition to α, β-unsaturated ketones. Russ Chem Bull 25, 795–797 (1976). https://doi.org/10.1007/BF00922382
- Hydrogenation Product