Preparation of 1-nitroanthraquinone-2-carboxylic acids

US5245058A · kind A · utility

Assignee

• BASF SE

Inventors

• Helmut Hagen · Bischofswerda, DE
• Jacques Dupuis · Ludwigshafen, DE
• Michael Acker · Ludwigshafen am Rhein, DE
• Udo Bergmann · Darmstadt, DE

Key dates

• Filing date: Aug 27, 1992
• Grant date: Sep 14, 1993
• Expiry date: Aug 27, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C201/12
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

1-Nitroanthraquinone-2-carboxylic acids of the general formula I ##STR1## where X is hydrogen, chlorine or bromine, are prepared by oxidizing a 1-nitro-2-methylanthraquinone of the general formula II ##STR2## with nitric acid in an organic reaction medium.