反应详情

温度

80 °C

2-Bromoethyl methyl ether (0.44 ml, 4.57 mmol) and cesium carbonate (2.48 g, 7.62 mmol) were added to an N,N-dimethylacetamide solution (5 ml) of 5,6-dichloropyridin-3-ol (500 mg, 3.05 mmol), and stirred under a nitrogen atmosphere at 80° C. for 5 hours. The reaction solution was cooled with ice, then ammonium chloride water and ethyl acetate were added, the organic layer was washed with water, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (Biotage, hexane:ethyl acetate=9:1) to obtain 2,3-dichloro-5-(2-methoxyethoxy)pyridine (573 mg, yield: 85%) as an orange oil.

1. temperatureThe reaction solution was cooled with ice
2. washthe organic layer was washed with water
3. dry with materialdried over anhydrous sodium sulfate
4. concentrationconcentrated under reduced pressure
5. customThe obtained residue was purified by silica gel column chromatography (Biotage, hexane:ethyl acetate=9:1)