Production of high molecular weight unsaturated ketones

US3954804A · kind A · utility

Assignee

• BASF SE

Inventors

• Roman Fischer · Mutterstadt, DE
• Norbert Goetz

Key dates

• Filing date: Mar 28, 1973
• Grant date: May 4, 1976
• Expiry date: Mar 28, 1993

Classification

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

Abstract

A process for the production of high molecular weight unsaturated ketones by alkylation of low molecular weight .alpha.,.beta.-unsaturated ketones with an allyl alcohol at elevated temperature in the presence of an acid catalyst. The products are intermediates for the production of various natural substances and perfumes such as the damascenones, damascones or natural dyes such as zeaxanthin, rhodoxanthin or xanthophyll.