PROCESS FOR THE PREPARATION OF COMPOUNDS OF THE 4-OXO-DAMASCON SERIES, AND PERFUMES OF THIS COMPOUND CLASS

Process for the preparation of the compounds of the formulae Ia and Ib Ia Ib wherein A. 2,4,4-trimethylcyclohex-2-en-1-one oxime of the formula IIb (IIb) is treated with a strong aqueous acid at from 30 DEG to 80 DEG C., preferably from 40 DEG to 70 DEG C., B. the resulting ketone of the formula III...

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Bibliographische Detailangaben
Hauptverfasser:	JANITSCHKE, LOTHAR, HOFFMANN, WERNER
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES CANDLES CHEMISTRY DETERGENT COMPOSITIONS DETERGENTS ESSENTIAL OILS FATTY ACIDS THEREFROM FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HUMAN NECESSITIES METALLURGY ORGANIC CHEMISTRY PERFUMES PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL PRODUCING (PRESSING, EXTRACTION), REFINING AND PRESERVINGFATS, FATTY SUBSTANCES (e.g. LANOLIN), FATTY OILS AND WAXES,INCLUDING EXTRACTION FROM WASTE MATERIALS RECOVERY OF GLYCEROL RESIN SOAPS SOAP OR SOAP-MAKING THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR TREATMENT, NOT COVERED BY OTHER CLASSES USE OF SINGLE SUBSTANCES AS DETERGENTS
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Beschreibung
Zusammenfassung:	Process for the preparation of the compounds of the formulae Ia and Ib Ia Ib wherein A. 2,4,4-trimethylcyclohex-2-en-1-one oxime of the formula IIb (IIb) is treated with a strong aqueous acid at from 30 DEG to 80 DEG C., preferably from 40 DEG to 70 DEG C., B. the resulting ketone of the formula IIIb (IIIb) is oxidized in a conventional manner, and C. if desired, the resulting compound Ib is isomerized in a conventional manner. Compounds of the formula A (A) where R is one of the following radicals: -CH(OH)-CH2-CH=CH2 (IIIb), -CH(OH)-CH3 (IIIc), -CH2OH (IIId), -CH(OH)-CH=CH2 (IIIe), -CH(OCOCH3)-CH3 (IIIf), -CH2-OCOCH3 (IIIg), -CO-CH2-CH=CH2 (Ib), -CO-CH3 (Ic), and -CO-CH=CH2 (Ie). The compounds IIIb to IIIg, Ib, Ic and Ie are useful scents and aromas, and furthermore may become important intermediates for novel carotenoids. They can be prepared in a relatively simple manner from compounds which are very readily available.