o-Bis(bromomethyl)benzene → HCID 53768906, compound

Participants

Reaction Steps

5 g (14 mmol) of (S)-1-(3-aminomethyl-1,2,4-oxadiazol-5-yl)-8-chloro-12,12a-dihydro-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepin-9-one, 50 ml of methylene chloride, 12 ml (70 mmol) of N-ethyldiisopropylamine and 3.7 g (14 mmol) of α,α'-dibromo-o-xylene were stirred at room temperature for 72 hours. The reaction solution was washed three times with water, dried over magnesium sulfate and evaporated. The residue was chromatographed on 70 g of silica gel while eluting with methylene chloride/ethyl acetate 7/3. There were obtained 4.0 g (62%) of (S)-8-chloro-12,12a-dihydro-1-(3-isoindolin-2-ylmethyl-1,2,4-oxadiazol-5-yl)-9H,11H-azeto[2,1-c]imidazo[1,5-a][1,4]benzodiazepin-9-one, which was converted into the hydrochloride of m.p. 170°-175°.

Provenance & Evidence