How is 1,4-Diamino-2,3-dichloroanthracene-9,10-dione (CAS: 70956-27-3) typically synthesized?

1,4-Diamino-2,3-dichloroanthracene-9,10-dione is typically synthesized by the condensation of dichloroanthracene and hydrazine in an acidic medium. The process involves the controlled substitution and amination reactions, yielding the compound in moderate to good yield. Catalysts such as sulfuric acid or p-toluenesulfonic acid are commonly used to improve the reaction selectivity and yield. The process is performed under mild conditions to avoid decomposition of the intermediate products.