Hydroxyamine hydrochloride → (S)-7-fluoro-12,12a-dihydro-9-oxo-9H,11H-azeto-[2,1-c]imidazo[1,5-a][1,4]benzodiazepine-1-carboxamidoxime

Participants

Reaction Steps

4.2 g (180 mmol) of sodium were dissolved in 225 ml of methanol. 13.55 g (195 mmol) of hydroxylamine hydrochloride and 40 g (149 mmol) of (S)-7-fluoro-9-oxo-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepine-1-carbonitrile were added and the reaction mixture was stirred at boiling temperature overnight. The suspension was cooled to 5° and suction filtered. The crystals were rinsed with water and dried. There were obtained 38.9 g (87%) of (S)-7-fluoro-9-oxo-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepine-1-carboxamidoxime, which was used in the next step without further purification.

Provenance & Evidence