A series of N-arylanthranilic acid derivatives were synthesised by amination of 2-chloro-5-nitrobenzoic acid with various arylamine in superheated water with potassium carbonate as base. Good yields were achieved within 2-3 h at 150-190 °C. The results indicated that this metal catalyst-free method is a simple, environmentally-friendly and efficient synthesis of N-phenylanthranilic acid derivatives. Furthermore, it will work with an alkylamine and phenol.
以碳酸钾为碱,在过热水中将 2-氯-5-硝基苯甲酸与各种芳基胺胺化,合成了一系列 N-芳基氨基苯甲酸衍生物。在 150-190 °C 的条件下,2-3 小时内即可获得良好的产率。结果表明,这种无金属催化剂的方法是一种简单、环保和高效的 N-苯基anthranilic 酸衍生物合成方法。此外,该方法还可用于烷基胺和苯酚。