METHOD FOR PREPARATION OF ALPHA, BETA-UNSATURATED CYCLIC KETONES BY DEHYDROGENATION OF SECONDARY ALLYLIC CYCLIC ALCOHOLS

摘要

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