Process for cyclizing upsilon-chlorocarboxylic acids

US4520209A · kind A · utility

Assignee

• Degussa AG · DE

Inventors

• Werner Schwarze · Frankfurt, DE
• Axel Kleemann · Hanau, DE
• Hans Remmel · Alzenau, DE
• Wolfgang Hohn · Berlin, DE

Key dates

• Filing date: Jun 28, 1984
• Grant date: May 28, 1985
• Expiry date: Jun 28, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C2601/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

.gamma.-chlorocarboxylic acid methyl or ethyl esters are cyclized to the corresponding cyclopropane carboxylic acid esters by employing the sodium or potassium alcoholate of methanol or ethanol in the presence of the same alcohol at a temperature above the boiling point of the alcohol employed.