3-(5-chloromethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepin-6-one → 3-(5-benzylaminomethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepin-6-one

Participants

Reaction Steps

1.5 g (4.5 mmol) of 3-(5-chloromethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepin-6-one were stirred at room temperature in 10 ml of benzylamine for 24 hours. By evaporation of the reaction mixture, chromatography of the residue on silica gel while eluting with methylene chloride/methanol 19/1 and crystallization from ethyl acetate and hexane there were obtained 1.3 g (71%) of 3-(5-benzylaminomethyl-1,2,4-oxadiazol-3-yl)-5-methyl-5,6-dihydro-4H-imidazo[1,5-a][1,4]benzodiazepin-6-one of melting point 88°-92°, which was converted into the hydrochloride of m.p. 178°-182°.

Provenance & Evidence