Dimethylformamide → HCID 22914500, compound

Participants

Reaction Steps

3.7 ml (21.8 mmol) of N-ethyldiisopropylamine and 1.4 ml (12.6 mmol) of 1-bromobutane were added to a solution of 1.0 g (3.16 mmol) of 7-(5-aminomethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a]thieno[3,2-f][1,4]diazepin-4-one in 30 ml of 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 with magnesium sulfate, filtered and evaporated. The residue obtained was chromatographed (silica gel, methylene chloride/methanol/aqueous ammonia 110:10:1). There were obtained 290 mg (22%) of 7-(5-dibutylaminomethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a]thieno[3,2-f][1,4]diazepin-4-one as a colourless foam, Rf=0.37 (silica gel, methylene chloride/methanol/aqueous ammonia 110:10:1).

Provenance & Evidence