Intermediates used in the process for preparing 1(4-pentenoyl)-3,3-dimethylcyclohexane

摘要

Described is a process for preparing the compound having the structure: <IMAGE> comprising the steps of reacting 1-acetyl-3,3-dimethylcyclohexane with a dialkyl carbonate; thereby forming a ketoester having the structure: <IMAGE> wherein R represents C1-C3 lower alkyl; reacting the said ketoester with an allyl halide to form a substituted ketoester having the structure: <IMAGE> saponifying the substituted ketoester with base forming a substituted keto carboxylic ester salt; and hydrolyzing the said keto carboxylic acid salt with acid to form the corresponding acid; and then heating and decarboxylating the resulting keto carboxylic acid to form the desired compound.