反应详情

温度

70 °C

810 mg (1.91 mmol) of 2-[4-[N-acetyl-N-(3-chloropropyl)amino]-3-fluorophenyl]-5-amino-6,8-difluoro-4H-1-benzopyran-4-one obtained in Example 50 was dissolved in 40 ml of dimethylformamide under argon atmosphere, 622 mg of sodium azide was added at room temperature and the mixture was stirred at 70° C. for 4 hours. Water was added to the reaction solution, the mixture was extracted twice with ethyl acetate, the organic layer was washed once with water and once with an aqueous saturated solution of sodium chloride and dried over anhydrous sodium sulfate, and the solvent was distilled off under reduced pressure to give 870 mg of 2-[4-[N-acetyl-N-(3-azidopropyl)amino]-3-fluorophenyl]-5-amino-6,8-difluoro-4H-1-benzopyran-4-one.

1. extractionthe mixture was extracted twice with ethyl acetate
2. washthe organic layer was washed once with water and once with an aqueous saturated solution of sodium chloride
3. dry with materialdried over anhydrous sodium sulfate
4. distillationthe solvent was distilled off under reduced pressure