反应详情

100 g of an equimolar mixture of chloromethyltriphenylphosphonium chloride and sodium amide were stirred for 45 minutes in 450 ml of tetrahydrofuran, whereby the temperature rose to 37°. 62.23 g (229.7 mmol) of 7-chloro-5,6-dihydro-5-methyl-6-oxo-4H-imidazo[1,5-a][1,4]benzodiazepine-3-carboxaldehyde were then added portionwise thereto at room temperature and, after completion of the addition, the mixture was stirred for a further 1 hour. The reaction mixture was subsequently filtered and the filtrate was evaporated. After chromatography of the residue on silica gel while eluting with cyclohexane/ether/wasopropanol (3:3:1) there was obtained 7-chloro-3-[(Z)-2-chlorovinyl]-4,5-dihydro-5-methyl-6H-imidazo[1,5-a][1,4]benzodiazepin-6-one of melting point 205°-207°.

1. customrose to 37°
2. additionat room temperature and, after completion of the addition
3. filtrationThe reaction mixture was subsequently filtered
4. customthe filtrate was evaporated
5. washAfter chromatography of the residue on silica gel while eluting with cyclohexane/ether/wasopropanol (3:3:1) there