摘要 |
Dye releasing compounds which release dyes corresponding to formula I <IMAGE> I wherein R1 denotes alkyl, aryl, arylamino, alkoxy or aryloxy, R2 denotes H or halogen, R3 denotes alkyl with 2-4 carbon atoms, R4 denotes H or one or more substituents such as alkyl, alkoxy, acylamino or halogen, including a substituent in the ortho-position to the group <IMAGE> which together with R5 completes a cyclic amino group, R5 denotes alkyl with up to 4 carbon atoms or a group which together with a subsituent denoted by R4 or together with R6 completes a cyclic amino group, and R6 denotes alkyl with up to 4 carbon atoms or a group which together with R5 completes a cyclic amino group are suitable for the production of light-stable cyan colour images.
|