Verfahren zur Herstellung von 4,4'-Diamino-1,1'-diaminoanthrachinolylen

摘要

1,149,819. Anthraquinone dyestuffs. CIBA Ltd. 8 Dec., 1967 [12 Dec., 1966], No. 55892/67. Heading C4P. 4,41 - Diamino - 1,11 - dianthraquinonyl- 3,31 - disulphonic acid which may be further substituted is prepared by heating 1-amino-4- halo anthraquinone-2-sulphonic acid which may be further substituted with a reducing agent in an aqueous medium in the presence of a catalytic quantity of copper or a copper compound. Hydroquinone is the preferred reducing agent.