反应详情

To a solution of 10 mmol of 6,7-dihydro-5H-pyrrolo[1,2-a][1,5]benzodiazepine in 30 ml of methylene chloride under argon is added 15 mmol of triethylamine followed by ice bath cooling. A solution of 11 mmol of 4-nitrobenzoyl chloride in 10 ml of methylene chloride is added dropwise. Following complete addition, the ice bath is removed and the reaction mixture stirred at room temperature for 2 hours. The volatiles are removed in vacuo to give a residue which is dissolved in ethyl acetate. The solution is washed with water, 2N citric acid, NaHCO3, and brine. The reaction mixture is dried with Na2 SO4, filtered and evaporated in vacuo to give a solid which is purified by flash chromatography on silica gel to give the desired product as a solid.

1. customfollowed by ice bath
2. temperaturecooling
3. additionaddition
4. customthe ice bath is removed
5. customThe volatiles are removed in vacuo
6. customto give a residue which
7. washThe solution is washed with water, 2N citric acid, NaHCO3, and brine
8. customThe reaction mixture is dried with Na2 SO4
9. filtrationfiltered
10. customevaporated in vacuo
11. customto give a solid which
12. customis purified by flash chromatography on silica gel