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Hydrogenation of unsaturated ketones: selective catalytic transfer hydrogenation of 5-hexen-2-one over MgO

✍ Scribed by György Szöllösi; Mihály Bartók

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
277 KB
Volume
148
Category
Article
ISSN
1381-1169

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✦ Synopsis

In the present study the selective catalytic transfer hydrogenation of an unsaturated ketone is described. During the heterogeneous catalytic transfer hydrogenation of 5-hexen-2-one with 2-propanol to 5-hexen-2-ol on MgO, the catalyst was continuously poisoned, which lead to a complete loss of activity. The major point of the present work is that the deactivation can be prevented by treatment with chloromethanes. The best results were obtained on MgO previously treated with chloroform. As a result the selectivity of the formation of 5-hexen-2-ol was close to 100% and no catalyst deactivation was Ž observed during the time period studied. Detailed investigations were carried out MgO treatment with different organochlo-. rine reagents, FT-IR spectroscopy, CDCl adsorption, reaction of chloromethanes with MgO in pulse system in order to 3 optimize the reaction conditions and to certify the mechanism proposed earlier.

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