Ethyl Bromide → HCID 22914483, compound

Participants

Reaction Steps

2.35 ml (13.6 mmol) of N-ethyldiisopropylamine and 0.76 ml (10.2 mmol) of ethyl bromide were added to a solution of 0.54 g (1.7 mmol) of 3-(5-aminomethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a]thieno[2,3-f][1,4]diazepin-6-one in 20 ml dimethylformamide and the mixture was stirred at 70° for 1 hour. The reaction solution was subsequently evaporated, whereupon the residue was partitioned between methylene chloride and 2N sodium carbonate solution. The aqueous phase was washed three times with methylene chloride. The organic phases were dried over magnesium sulfate, filtered and evaporated. The residue obtained was chromatographed (silica gel, methylene chloride/methanol/aqueous ammonia 110:10:1). There were obtained 301 mg (47%) of 3-(5-diethylaminomethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a]thieno[2,3-f][1,4]diazepin-6-one as a colourless foam, Rf=0.66 (silica gel, methylene chloride/methanol/aqueous ammonia 110:10:1).

Provenance & Evidence