Dibutylamine → (S)-8-chloro-1-(5-dibutylaminomethyl-1,2,4-oxadiazol-3-yl)-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]-benzodiazepin-9-one

Participants

Reaction Steps

3.76 g (10 mmol) of (S)-8-chloro-1-(5-chloromethyl-1,2,4-oxadiazol-3-yl)-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a]-[1,4]benzodiazepin-9-one were stirred at room temperature overnight with 5 g (39 mmol) of dibutylamine and 25 ml of N,N-dimethylformamide. By evaporation of the reaction mixture and chromatography of the residue on silica gel while eluting with ethyl acetate there were obtained 4.3 g (92%) of (S)-8-chloro-1-(5-dibutylaminomethyl-1,2,4-oxadiazol-3-yl)-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]-benzodiazepin-9-one, which was converted into the hydrochloride of m.p. 120°-125°.

Provenance & Evidence