Patent ID: 7678907
Filing Date: 2010-03-16
Classification: C07D,C08K,C09B

Abstract:
1. A process for preparing halogenated rylenecarboximides of the general formula I in which the variables are each defined as follows: A, B together are an imide radical of the formula R, R′ are each independently: R R Hal is chlorine, bromine or iodine; n is 1, 2 or 3; x is from 1 to 8, by reacting a rylenecarboximide of the general formula II in which the A′ and B′ radicals are an imide radical of the formula or, in the case that n is 1, are also each hydrogen with 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.