Sodium Carbonate → HCID 54131238, compound

Participants

Reaction Steps

A solution of 19 g (70 mmol) of 5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylic acid hydrazide in 60 ml of water and 150 ml of glacial acetic acid is treated dropwise at 0° to 5° with a solution of 16.5 g of sodium nitrite in 30 ml of water. The white suspension is subsequently stirred in an ice-bath for 1 hour and cautiously poured into 150 g of sodium carbonate in 400 ml of water. The precipitated material is filtered off under suction, washed with water and dried. There is obtained 5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxylic acid azide which decomposes at 160°.

Provenance & Evidence