Preparation of N,N'-dialkylperylene-3,4,9,10-tetracarboxylic acid diimides

US6084099A · kind A · utility

Assignee

• BASF SE

Inventors

• Claus Hackmann · Ludwigshafen, DE
• Michael Acker · Ludwigshafen am Rhein, DE
• Georg Henning · Ludwigshafen, DE
• Siegfried Mensch · Frankenthal (Pfalz), DE

Key dates

• Filing date: Oct 28, 1998
• Grant date: Jul 4, 2000
• Expiry date: Oct 28, 2018

Classification

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

Abstract

Preparation of N,N'-di(C.sub.1 -C.sub.4 alkyl)perylene-3,4,9,10-tetracarboxylic acid diimides (I) by the reaction of perylene-3,4,9,10-tetracarboxylic acid diimide (II) with a C.sub.1 -C.sub.4 alkyl halide, in which the reaction is carried out in a dipolar-aprotic organic solvent in the presence of an inorganic base.