Produits à odeur de violette. 61e communication. Synthèse d'une d, l‐γ‐irone

Using 1,1,6‐trimethyl‐2‐carbethoxy‐cyclohexan‐3‐one as starting material, 6‐methyl‐γ‐ cyclo geranic ester, 6‐methyl‐γ‐ cyclo geraniol, and 6‐methyl‐γ‐ cyclo citral have been synthesized. 6‐Methyl‐γ‐ cyclo citral, condensed with acetone, led to a mixture of about equal parts of 6‐methyl‐γ‐ and 6‐methyl‐b̃‐ionone (γ‐ and β‐irone). The two ketones have been separated by means of their phenylsemicarbazones.