Method of manufacturing chlorine-free cyclopropanecarboxylic acid methyl ester

US5371270A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventors

• Manfred Kaufhold · Marl, DE
• Josef Metz · Neuss, DE

Key dates

• Filing date: May 11, 1993
• Grant date: Dec 6, 1994
• Expiry date: May 11, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/317
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A method of manufacturing chlorine-free cyclopropanecarboxylic acid methyl ester is described wherein a first portion of alkali methoxide is added to a high-boiling solvent, followed by a second portion of methoxide with an equimolar portion of 4-chlorobutyric acid. The ester product can be readily hydrogenated catalytically to the corresponding carbinol.