Halogenation of rylen-carboximides with elementary halogen in a two-phase mixture comprising an organic solvent and water, wherein formed halogen hydroxide is continuously removable from the organic solvent

US7678907B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Martin Koenemann · Ludwigshafen, DE
• Neil Gregory Pschirer · Mainz, DE

Key dates

• Filing date: Sep 28, 2005
• Grant date: Mar 16, 2010
• Expiry date: Mar 8, 2027

Classification

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

Abstract

A process for preparing halogenated rylenecarboximides of the general formula Iin which the variables are each defined as follows: in which the A′ and B′ radicals together are an imide radical or, in the case that n is 1, are also each hydrogenwith elemental halogen in the presence of an inert organic solvent S1, which comprises continuously withdrawing the hydrogen halide formed in the course of the reaction from the solvent S1.