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１，８－二氨基－４，５－二羟基蒽醌的酰化物具有负二向色性，可用于正型彩色液晶显 示．研究了１，８－二羟基葱醌的硝化、还原及酰化反应条件．在硼酸存在下用混酸硝化． 进一步用硫化碱还原制得１，８－二氨基－４，６－二羟基蒽醌，用Ｔ．Ｌ．Ｃ．分离硝化产物． 经质谱和核磁氢谱确证了主要副产物的结构是１，８－二羟基－２．５－二硝基蒽醌．１．８－二 氨基－４．５－二羟基蒽醌与对位取代的苯甲酰氯反应时，在氯苯介质中只发生氨基酰化， 而在吡啶介质中氨基和羟基同时被酰化．
The acylate of 1,8-diamino-4,5-dihydroxyanthraquinone has negative dichroism and can be used for positive-type color liquid crystal display. The nitration, reduction and acylation reaction conditions of 1,8-dihydroxygonquinone were studied. Nitric acid with a mixed acid in the presence of boric acid. Further, 1,8-diamino-4,6-dihydroxyanthraquinone was obtained by reducing with an alkali sulfide and using T. L. C. The nitration product is isolated. The structure of the major byproduct was confirmed by mass spectrometry and 1H NMR spectroscopy to be 1,8-dihydroxy-2,5-dinitroanthraquinone. In the reaction of 1.8-diamino-4,5-dihydroxyanthraquinone with the para-substituted benzoyl chloride, only aminoacylation occurs in the chlorobenzene medium while the amino and hydroxyl groups are simultaneously acylated in the pyridine medium.