反应详情

6.78 g (20 mmol) of 4,5-dihydro-3-iodo-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one was heated to boiling under reflux for 7 hours with 1.75 g (25 mmol) of 3-butyn-2-ol, 70 mg of bis-(triphenylphosphine)-palladium(II) dichloride and 15 mg of copper(I) iodide in 50 ml of diethylamine and 30 ml of ethylene chloride. The reaction mixture was evaporated and the residue was chromatographed on silica gel while eluting with ethyl acetate. After recrystallization from ethyl acetate and hexane there was obtained 4,5-dihydro-3-(3-hydroxy-1-butynyl)-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one of melting point 161°-162°.

1. customThe reaction mixture was evaporated
2. customthe residue was chromatographed on silica gel
3. washwhile eluting with ethyl acetate
4. customAfter recrystallization from ethyl acetate