Synthesis of benzimidazole substituted pyridone azo disperse dyes

Abstract Benzimidazole substituted couplers containing pyridone as a basic moiety were prepared by the condensation of appropriate amines with glutaconic anhydride ( 1 ). The resulting glutaconimides were coupled with diazotized arylamines to form azo disperse dyes, the fastness properties of which were evaluated.