反应详情

To 100 mL of a tetrahydrofuran solution containing 5.8 g of (2,6-dichloro-5-fluoropyridin-3-yl)methanol, 1.8 g of 60% sodium hydride and 2 mL of a tetrahydrofuran solution containing 2.4 mL of chloromethyl methyl ether were added under cooling with ice, and the mixture was stirred at room temperature for 1 hour. Water and ethyl acetate were added thereto, the organic layer was separated, washed sequentially with water and an aqueous saturated sodium chloride solution, and dried over anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [eluent; hexane:ethyl acetate=8:1] to obtain 5.6 g of a colorless oily substance, 2,6-dichloro-3-fluoro-5-((methoxy)methyl)pyridine.

1. additionwere added
2. temperatureunder cooling with ice
3. customthe organic layer was separated
4. washwashed sequentially with water
5. dry with materialan aqueous saturated sodium chloride solution, and dried over anhydrous magnesium sulfate
6. customthe solvent was removed under reduced pressure
7. customThe residue thus obtained
8. customwas purified by silica gel column chromatography [eluent; hexane:ethyl acetate=8:1]