Process for the preparation of substituted acetic acids and derivatives thereof

US4417073A · kind A · utility

Assignee

• Dynamit Nobel A.G. · DE

Inventors

• Otto Ackermann
• Gerhard Daum

Key dates

• Filing date: Nov 25, 1981
• Grant date: Nov 22, 1983
• Expiry date: Nov 25, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C51/38
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the preparation of substituted acetic acids and derivatives thereof, having the formula ##STR1## wherein X is --COOH, --COOY or --CN, PA1 Y is --CH.sub.3 or --C.sub.2 H.sub.5, PA1 R.sub.1 is a saturated, branched or unbranched aliphatic radical having from 1 to 6 carbon atoms, a phenyl radical, or a phenyl radical substituted by alkyl or alkoxy groups, and PA1 R.sub.2 is hydrogen or a saturated, branched or unbranched aliphatic radical having from 1 to 6 carbon atoms, a phenyl radical, or a phenyl radical substituted by alkyl or alkoxy groups, PA1 wherein R.sub.1 and R.sub.2 may be the same or different which process comprises converting the corresponding malonic or cyanoacetic ester of the formula ##STR2## wherein Z is --COOY or --CN, and PA1 Y, R.sub.1 and R.sub.2 are identified as above at elevated temperature in the presence of a catalyst, e.g., a catalyst containing from about 50 to 75 weight percent SiO.sub.2 and from 15 to 19 weight percent Al.sub.2 O.sub.3 and exhibit ignition losses ranging from 15 to 20 weight percent.