Preparation of chlorocarboxylic acid chlorides

US4764309A · kind A · utility

Assignee

• BASF SE

Inventors

• Martin Decker · Ludwigshafen, DE
• Franz Neumayr

Key dates

• Filing date: Jun 29, 1987
• Grant date: Aug 16, 1988
• Expiry date: Jun 29, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/60
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Chlorocarboxylic acid chlorides of the formula ##STR1## where R is H or alkyl and n is an integer from 2 to 4, are prepared by reacting a lactone of the formula ##STR2## with phosgene at elevated temperatures and in the presence of a quaternary ammonium salt.