Manufacture of unsaturated ketones

US3932462A · kind A · utility

Assignee

• BASF SE

Inventors

• Norbert Goetz
• Roman Fischer · Mutterstadt, DE

Key dates

• Filing date: Nov 13, 1973
• Grant date: Jan 13, 1976
• Expiry date: Nov 13, 1993

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Manufacture of high molecular weight unsaturated ketones by reacting allyl alcohols with 1-substituted butadiene-1-alkyl ethers or with 1-substituted butadiene-1-alkyl esters or with substances capable of forming said compounds under the conditions of the reaction, in the presence of acid catalysts at elevated temperatures and in the liquid phase. The resulting unsaturated ketones are precursors or intermediates in the manufacture of a variety of natural dyes such as zeaxanthin, rhodoxanthin and xanthophyll or of odorants such as damascones and damascenones.