反应详情

A mixture of benzoxazine-2,4-dione (1.6 g, 10 mmol) and 4-chloroaniline (2.5 g, 20 mmol) in 1,4-dioxane (30 mL) was heated at reflux for 15 hours. After cooling the solid was filtered, and the filtrate was concentrated, washed with ethyl ether. The washing was concentrated further to a solid. Additional washing with cold ethyl ether (10 mL) afforded N-(4-chlorophenyl)-2-aminobenzamide as a tan solid; NMR (DMSO-d6) 10.1 (s, 1), 7.8 (d, 2), 7.6 (d, 1), 7.4 (d, 2), 7.2 (t, 1), 6.8 (d, 1), 6.6 (t, 1), 6.3 (s, 2) ppm.

1. temperaturewas heated
2. temperatureat reflux for 15 hours
3. temperatureAfter cooling the solid
4. filtrationwas filtered
5. concentrationthe filtrate was concentrated
6. washwashed with ethyl ether
7. concentrationThe washing was concentrated further to a solid
8. washAdditional washing with cold ethyl ether (10 mL)