10-iminoanthracen-9-one

Conditions: temp:190.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A reaction vessel is charged with 5000 parts of nitrobenzene to which are added 428.5 parts of 1,5-dichloroanthraquinone, 670 parts of 1-aminoanthraquinone, 250 parts of anhydrous sodium carbonate and 10 parts of copper(I) chloride. With stirring, the mixture is heated to 190° C. and a further 10 parts of copper(I) chloride are added. After reflux distillation without pressure over 5 hours, the reaction mixture is heated to 240° C. and the pressure rises to 2 bar. Stirring is continued for 4 hours under these conditions. The reaction mixture is cooled and the reaction product is isolated and dried, affording 976 parts (97% yield, based on 1,5-dichloroanthraquinone) of the anthraquinone imide of the formula ##STR2## This anthraquinone imide is converted into a yellow vat dye by a double carbazole cyclisation. After reflux distillation without pressure over 5 hours the reaction mixture is heated to 240° C. Stirring The reaction mixture is cooled the reaction product is isolated dried

Conditions: temp:190.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: A reaction vessel is charged with 5000 parts of nitrobenzene to which are added 428.5 parts of 1,5-dichloroanthraquinone, 670 parts of 1-aminoanthraquinone, 250 parts of anhydrous sodium carbonate and 10 parts of copper(I) chloride. With stirring, the mixture is heated to 190° C. and a further 10 parts of copper(I) chloride are added. After reflux distillation without pressure over 5 hours, the reaction mixture is heated to 240° C. and the pressure rises to 2 bar. Stirring is continued for 4 hours under these conditions. The reaction mixture is cooled and the reaction product is isolated and dried, affording 976 parts (97% yield, based on 1,5-dichloroanthraquinone) of the anthraquinone imide of the formula ##STR2## This anthraquinone imide is converted into a yellow vat dye by a double carbazole cyclisation. After reflux distillation without pressure over 5 hours the reaction mixture is heated to 240° C. Stirring The reaction mixture is cooled the reaction product is isolated dried