反应详情

To a stirred solution of 1,2,3,4-tetrahydro-4,4-dimethyl-7-nitroquinoline (Rami et al, WO 03/068749) (500 mg, 2.42 mmol), DMAP (5 mg) in pyridine (2 mL) was added acetic anhydride (0.46 mL, 4.9 mmol). The mixture was stirred at room temperature for 10 h, and then heated at 60° C. for 5 h. After cooling, the mixture was treated with water and extracted with EtOAc. The combined organic layers were washed with sat. aq. NaHCO3, 1N HCl, brine, dried, and evaporated. The residue was purified by chromatography to give a light yellow solid (550 mg, 92%).

1. temperatureheated at 60° C. for 5 h
2. temperatureAfter cooling
3. extractionextracted with EtOAc
4. washThe combined organic layers were washed with sat. aq. NaHCO3, 1N HCl, brine
5. customdried
6. customevaporated
7. customThe residue was purified by chromatography