Synthesis of benzo [6, 7] [1, 2, 4] triazepino [4, 3a] quinoxaline-6, 13 (5H, 8H)‎ diones from anthranilic acid and 1, 2-diaminobenzene

الملخص EN

1, 2-Diaminobenzene adds to hydrazonoyl chlorides derived from anthranilic acid to yield 2-(2-(3- oxo-3, 4-dihydroquinoxalin-2 (1H) ylidene) hydrazinyl) benzoic acids 8.

The latter compounds cyclize to the corresponding benzo [6, 7] [1, 2, 4] triazepino [4, 3a] quinoxaline-6, 13 (5H, 8H) diones upon treatment with carbonyldiimidazole 9.