反应详情

Acetic anhydride (6 ml) was added to formic acid (6 ml), followed by stirring at room temperature for 20 minutes. Then, a solution of 2,6-difluoro-3-aminopyridine (2.06 g) in tert-butyl methyl ether (7 ml) was added so that the reaction solution was maintained at room temperature. The reaction solution was further stirred at room temperature for four hours. Ethyl acetate and a saturated sodium bicarbonate solution were added to the reaction solution, and the organic layer was separated. The resulting organic layer was washed with brine and then dried over anhydrous sodium sulfate. The drying agent was separated by filtration, and then the organic layer was concentrated under reduced pressure. The residue was purified by silica gel column chromatography to obtain the title compound (2.42 g). The property values of the compound are as follows.

1. temperaturewas maintained at room temperature
2. stirringThe reaction solution was further stirred at room temperature for four hours
3. customthe organic layer was separated
4. washThe resulting organic layer was washed with brine
5. dry with materialdried over anhydrous sodium sulfate
6. customThe drying agent was separated by filtration
7. concentrationthe organic layer was concentrated under reduced pressure
8. customThe residue was purified by silica gel column chromatography