Process for preparing cyclopropanecarboxylates of lower alcohols

US6730804B1 · kind B1 · utility

Assignee

• Degussa AG · DE

Inventors

• Manfred Kaufhold · Marl, DE
• Marcel Feld · Cologne, DE

Key dates

• Filing date: Aug 27, 1998
• Grant date: May 4, 2004
• Expiry date: Aug 27, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Cyclopropanecarboxylates of lower alcohols are prepared by esterification of the corresponding cyclopropanecarboxylic acids with the corresponding lower alcohols in the presence of an acid catalyst, while maintaining a considerable stoichiometric excess of the cyclopropanecarboxylic acid with respect to the lower alcohol, keeping the temperature at from 100 to 200° C. and distilling off the cyclopropanecarboxylate together with the water of reaction and small amounts of alcohol. Cyclopropanecarboxylates of lower alcohols are valuable intermediates in the pharmaceutical and agrochemical sectors.