Alkenyl and alkylidene norbornyl ketone derivatives

Abstract

Described for the use in foodstuff, chewing gum, toothpaste and medicinal product flavor and aroma, tobacco flavor and aroma and perfume aroma augmenting, modifying, enhancing and imparting compositions and as foodstuff, chewing gum, toothpaste, medicinal product, tobacco, perfume and perfumed article aroma imparting materials are one or more alkenyl or alkylidene norbornyl ketone derivatives having the generic structure: ##STR1## wherein R is C.sub.3 -C.sub.5 alkenyl or C.sub.3 -C.sub.5 alkylidene and the dashed lie is a carbon-carbon single bond or a carbon-carbon double bond, specifically the compounds having the structures: ##STR2## and products produced according to the process of reacting 2-acetyl-3,3-dimethyl-5-norbornene with a complex of N-methylaniline and an alkyl magnesium halide to form a grinard salt of 2-acetyl-3,3-dimethyl-5-norbornene having the structure: ##STR3## said reacting being carried out from -5.degree. C. up to about 40.degree. C.; reacting the resulting compound with acid aldehyde in the presence of a solvent selected from the group consisting of benzene, tetrahydrofuran, and diethyl ether at a temperature in the range of from -5.degree. C. up to 20.degree. C.; hydrolyzing the resulting material to form substantially a keto alcohol in the presence of a mineral acid; and then dehydrating the resulting keto alcohol with a mild dehydrating agent at a temperature in the range of from 80.degree. C. up to 150.degree. C. over a period of time of from 1 up to 5 hours in the presence of a strong acid.