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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.

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Design and Synthesis of Some New N-Phenylanthranilic Acids from Highly Sterically Hindered Anilines. -A series of new N-arylanthranilic acids of type (III) are prepared from 2-chlorobenzoic acids and sterically hindered aniline derivatives using copper(I) iodide as catalyst. Compared to conventional heating, the application of microwaves gives slightly higher yields with shorter reaction times. -(LI, Z.; CHEN, G.; QIAO, S.; LIANG, R.; LAN, C.; XIA*, Z.; Synth. Commun. 43 (2013) 9, 1270-1279, http://dx.