International Flavors & Fragrances Inc.

Steven D Temes

Richard M Boden

Theodore J Tyszkiewicz

Marie R Hanna

Described are compounds defined according to the structure: ##STR1## wherein R.sub.3, R.sub.4, R.sub.5, R.sub.6 and R.sub.7 represent hydrogen or methyl with the provisos that:

Branched C.sub.13 -alk-1-en-5-ones and use thereof in perfumery

Described is a novel process for preparing allyl alpha and beta ionones defined according to the structure: ##STR1## wherein one of the dashed lines represents a carbon-carbon double bond and the other of the dashed lines represents a carbon-carbon single bond; and wherein the wavy lines represent the cis or trans juxtaposition of the acyl and cyclohexenyl rings about the carbon-carbon double bond which is alpha to the acyl moiety, and intermediates used in said process defined according to the structure: ##STR2## wherein the wavy lines and dashed lines are defined supra and wherein R.sub.1 represents hydrogen or allyl and Z represents methyl or OR.sub.2 and wherein R.sub.2 represents methyl or ethyl.

Growing community of inventors

Hazlet, NJ, United States of America

Steven D Temes