Process for the preparation of haloanthranilic acids

US5744638A · kind A · utility

Assignee

• Riedel-De Haen Aktiengesellschaft · DE

Inventors

• Horst Schmand · Bad Nenndorf, DE
• Bernd Kellermeier · Sachsenhagen, DE
• Gunter Bartels · Großburgwedel, DE
• Hans-Jurgen Schmidt · Speyer, DE

Key dates

• Filing date: Jan 13, 1995
• Grant date: Apr 28, 1998
• Expiry date: Jan 13, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C63/70
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of compounds of the general formula I ##STR1## in which X and Y, independently of each other, represent hydrogen, fluorine, chlorine or bromine, but cannot simultaneously represent hydrogen, characterised in that compounds of the general formula II ##STR2## in which X and Y are defined as above, are reacted with aqueous ammonia under copper catalysis, and to intermediates for the preparation of compounds of the general formula I.