Method for preparation of alpha, beta-unsaturated cyclic...

Details Method for preparation of alpha, beta-unsaturated cyclic... Method for preparation of alpha, beta-unsaturated cyclic...

C - Chemistry, Metallurgy

07

C

C07C 45/00 (2006.01)

Patent

CA 2527262

A process for the manufacture of an alpha, beta-unsaturated cyclic ketone, such as carvone, comprises the dehydrogenation of a secondary allylic cyclic alcohol, such as carveol, in the presence of at least one metal carboxylate. The process can be performed in a batchwise or continuous mode. Examples of suitable metal carboxylates include magnesium stearate, calcium 2- ethylhexanoate, and zinc 2- ethylhexanoate.

L'invention concerne un procédé pour l'élaboration de cétone cyclique alpha, bêta-insaturée, du type carvone, par déshydrogénation d'alcool cyclique allylique secondaire, du type carvéol, en présence d'au moins un carboxylate de métal. On peut procéder par lots ou en mode continu. Par exemple, des carboxylates de métal appropriés renferme les éléments suivants: stéarate de magnésium, 2-éthylhexanoate de calcium, et 2- éethylhexanoate de zinc.

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