The invention relates to novel specifically trifluoromethyl and halogensubstituted 1,3-diphenyl ureas and their use as active ingredients in the preparation of pharmaceutical compositions.
This article studies the reactions of nitrous acid with eldest aromatic amine and diazonium salts substituted by halogen, and investigates the condition and mechanism of those reactions.
通过对亚硝酸与伯芳胺反应形成重氮盐,以及重氮盐被卤素取代生成卤代芳烃的反应条件和反应机理的研究。
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Results showed that this kind of compounds has excellent photobleaching property. The bleaching effect of phthalocyanines containing halogen substituent is better than the one that is not substituted.