Process for preparing esters

US6525213B1 · kind B1 · utility

Assignee

• SOLVAY FLUOR und DERIVATE GmbH · DE

Inventors

• Max Braun · Großburgwedel, DE
• Kerstin Eichholz · Langenhagen, DE

Key dates

• Filing date: Mar 25, 2002
• Grant date: Feb 25, 2003
• Expiry date: Mar 25, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C67/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

An improved process for preparing carboxylic acid esters from acid chlorides, acid bromides or acids and alcohols provides for performing the esterification in the presence of the adduct (onium salt) of the corresponding carboxylic acid and 1,5-diazabicyclo[4.3.0]-non-2-ene or 1,8-diazabicyclo[5.4.0]-undec-7-ene. Alternatively, it is possible to operate in the presence of the corresponding carboxylic acid and an onium salt of the corresponding carboxylic acid.