Ammonia → HCID 22914476, compound

Participants

Reaction Steps

24.9 g (74.1 mmol) of 7-bromo-5-methyl-6-oxo-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylic acid were suspended in 100 ml of N,N-dimethylformamide, treated at room temperature with 14.3 g (89 mmol) of 1,1'-carbonyldiimidazole and stirred at 70° for 30 minutes. 50 ml of 25% ammonia were added dropwise at 25°-30°. The reaction mixture was diluted with 200 ml of water and cooled to 0°, and the crystallizate was filtered off under suction and dried. There were obtained 21.6 g (86%) of 7-bromo-5-methyl-6-oxo-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxamide of m.p. 278°-279°.

Provenance & Evidence