Preparation of carboxylic esters

US5412120A · kind A · utility

Assignee

• BASF SE

Inventors

• Rolf Fischer · Heidelberg, DE
• Norbert Goetz
• Thomas Kuekenhoehner · Bischofswerda, DE
• Werner Schnurr · Herxheim, DE

Key dates

• Filing date: Nov 29, 1993
• Grant date: May 2, 1995
• Expiry date: Nov 29, 2013

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D309/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for preparing monocarboxylic esters of the general formula I ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.3 -C.sub.8 -cyclo-alkyl acyl, aryl or C.sub.7 -C.sub.20 -aralkyl or together --(CH.sub.2).sub.n --X--(CH.sub.2).sub.m --, PA1 X is methylene, oxygen, sulfur, NH or NR.sup.3, PA1 R.sup.3 is C.sub.1 -C.sub.12 -alkyl, and PA1 n and m are each from 0 to 8, comprises reacting geminal dicarboxylic esters of the general formula II ##STR2## where R.sup.1 to R.sup.3 are each as defined above, at from 150.degree. to 400.degree. C. in the presence of catalysts.