反应详情

4-Chloroquinoline (5 g, 31 mmol) was dissolved in sulfuric acid (23 mL, 0.42 mol), to which nitric acid (4.5 mL, 0.11 mol) was slowly added dropwise, which was then stirred at room temperature for four hours. When the reaction was completed, the resultant was cooled to 0° C., and neutralized with 1M ammonium hydroxide. The generated solid was dissolved in ethyl acetate, dried with anhydrous sodium sulfate, and then filtered. The solvent was removed by vacuum distillation, and the residue was purified by a column chromatography (ethyl acetate/n-hexane=⅓) to obtain 3.55 g of the desired compound as a white solid (yield 55.7%).

1. additionwas slowly added dropwise
2. temperaturethe resultant was cooled to 0° C.
3. dry with materialdried with anhydrous sodium sulfate
4. filtrationfiltered
5. customThe solvent was removed by vacuum distillation
6. customthe residue was purified by a column chromatography (ethyl acetate/n-hexane=⅓)