A new effective approach for synthesizing diverse N-substituted-benzene-1,2-diamines is reported. The treatment of N-substituted-2-nitroanilines with thiourea dioxide in the presence of sodium hydroxide efficiently formed the corresponding N-substituted-benzene-1,2-diamines, including N-(4-chlorophenyl)benzene-1,2-diamine with a good yield of 94%. The by-product is environmentally-friendly urea and is easy to separate from the product by filtration procedure that enhances the convenience of the approach.

中文翻译：

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使用二氧化硫脲将N-（4-氯苯基）-2-硝基苯胺及其衍生物绿色实用还原为相应的N-取代苯-1,2-二胺

报道了一种合成多种N-取代-苯-1,2-二胺的新有效方法。在氢氧化钠存在下用二氧化硫脲处理N-取代的-2-硝基苯胺有效地形成了相应的N-取代的苯-1,2-二胺，包括N-（4-氯苯基）苯-1,2-二胺收率为94％。副产物是环保尿素，易于通过过滤程序从产物中分离出来，从而增加了方法的便利性。