| 摘要 |
The invention relates to pyrrolo[3,4-c]pyrroles of formula <IMAGE> (I) wherein A and B are each independently of the other a group of formula <IMAGE> <IMAGE> or Q, wherein Q is a 5- or 6-membered heterocyclic aromatic amine oxide radical which is unsubstituted or substituted by one, two or three C1-C18alkyl, C1-C18alkoxy or <IMAGE> and which may contain one or two fused benzene rings, R1 and R2 are each independently of the other hydrogen, halogen, C1-C18alkyl, C1-C18alkoxy, C1-C18alkylmercapto, -CN, -NO2 or trifiuoromethyl, D and E are each independently of the other hydrogen, C1-C18alkyl, C2-C4alkenyl, C7-C10aralkyl, unsubstituted phenyl or phenyl which is substituted by chloro, bromo, C1-C6alkyl, C1-C4alkoxy, trifiuoromethyl or nitro, with the proviso that at least one of the sustituents A and B is an amine oxide radical Q. These novel diketopyrrolo[3,4-c]pyrroles are suitable for use as pigments, but especially as photoconductive substances in electrophotographic photoreceptors.
|
