反应详情

温度

60 °C

In methanol (60 mL) was dissolved 3.00 g (11.8 mmol) of 4,6-dichloro-3-(2-methylphenoxy)pyridazine obtained in Example 1 (2), 1.00 g (17.6 mmol) of 95% sodium methoxide was added to the solution at room temperature and the mixture was stirred at 60° C. for 4 hours. Moreover, 1.00 g (17.6 mmol) of 95% sodium methoxide was further added and after stirring the mixture at 60° C. for 1 hour, it was allowed to stand at room temperature overnight. The reaction mixture was concentrated, ethyl acetate was added to the residue, and the mixture was successively washed with water and brine. After drying over anhydrous sodium sulfate, the solvent was removed, and the obtained residue was purified by silica gel column chromatography (eluted with hexane:ethyl acetate=4:1) to obtain 2.75 g (11.0 mmol, Yield: 93.2%) of 6-chloro-4-methoxy-3-(2-methylphenoxy)pyridazine.

1. additionwas added to the solution at room temperature
2. stirringafter stirring the mixture at 60° C. for 1 hour
3. waitto stand at room temperature overnight
4. concentrationThe reaction mixture was concentrated
5. additionethyl acetate was added to the residue
6. washthe mixture was successively washed with water and brine
7. dry with materialAfter drying over anhydrous sodium sulfate
8. customthe solvent was removed
9. customthe obtained residue was purified by silica gel column chromatography (eluted with hexane:ethyl acetate=4:1)