Abstract

The processes of indirect cathodic amination of para, ortho, and meta-chloroanilines by means of the Ti(IV)–NH₂OH system in aqueous solutions of 9–17 M sulfuric acid are studied. The efficiency and regioselectivity of radical cation substitution increase with the increase in electrolyte acidity and temperature. Functionalization of para-chloroaniline in 17 М H₂SO₄ produces 4-chloro-1,3-phenylenediamine with the mass fraction of 99.7%. Its yield corresponding to the complete conversion of hydroxylamine is 91%. The only side product of amination is para-phenylidenediamine.

中文翻译：

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硫酸水溶液中氯代苯胺的电化学胺化

摘要

研究了在9-17 M硫酸水溶液中，Ti（IV）-NH ₂ OH体系间接对位，邻位和间氯苯胺的阴极胺化过程。自由基阳离子取代的效率和区域选择性随着电解质酸度和温度的增加而增加。对氯苯胺在17МH ₂ SO _4中的官能化产生4-氯-1,3-苯二胺，质量分数为99.7％。其对应于羟胺的完全转化的产率为91％。氨基化的唯一副产物是对-苯二胺。