Process for the preparation of perylene-3,4,9,10-tetracarboxylic acid monoanhydride monoimides

US4709029A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Ernst Spietschka · Idstein, DE
• Helmut Troster · Königstein, DE

Key dates

• Filing date: Jan 23, 1986
• Grant date: Nov 24, 1987
• Expiry date: Jan 23, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B5/62
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula ##STR1## in which R denotes hydrogen, hydroxyl, amino or optionally substituted alkyl, X denotes chlorine or bromine and n is a number from zero to 4, are obtained from the corresponding mono-alkali metal salts of perylene-3,4,9,10-tetracarboxylic acid monoanhydrides by reaction with compounds of the formula R-NH.sub.2, in which R has the above meaning, at 0.degree.-130.degree. C. The compounds are colorants or starting materials for colorants.