Methyl 2-Hexyl-3-oxocyclopentanecarboxylate

Use

Methyl 2-Hexyl-3-oxocyclopentanecarboxylate is a colorless liquid with a longlasting, floral, jasmine-like odor that has only little of the fatty aspect characteristic of many jasmine fragrances. The product has not been found in nature. The title compound can be prepared by condensing an alkyl ??-bromocaprylate with a trialkyl propane-1,1,3-tricarboxylate to give a substituted cyclopentanone. Hydrolysis, decarboxylation, and esterification of the resulting monocarboxylic acid with methanol yield the desired ester. Trialkyl propane-1,1,3- tricarboxylates can be prepared by Michael addition of dialkyl malonates to alkyl acrylates. The compound is used in perfumery in floral compositions.