2520-63-0Relevant academic research and scientific papers
Process for the production of unsaturated ketones
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, (2008/06/13)
There is disclosed a process for preparing unsaturated ketones especially terpenoid ketones, by subjecting a substituted propargyl alcohol of formula (II) STR1 wherein R is a group containing 1 or 2 substituted or unsubstituted alkyl- or alkylene units containing 4 carbon atoms each to a thermal treatment sufficient to rearrange its structure in order to obtain structurally isomeric unsaturated ketones of formula I STR2 wherein one of the substituents X3 and X4 is hydrogen and the other and Z2 together form a bond. The process can be effected in the presence of an isomerization catalyst, which leads to high percentage of α.β,γ.δ-unsaturated ketones. The ketones of formula I are useful as perfumes and as intermediates for the production of terpenoid compounds.
