反应详情

To a mixture of (2-fluoropyridin-4-yl)methanol (300 mg), triethylamine (239 mg), and dichloromethane (24 mL) was added anhydrous trifluoromethanesulfonic acid (666 mg) under ice-cooling, followed by stirring at the same temperature for 1 hour. (Tetrahydro-2H-pyran-4-yl)methanol (1.37 g) was added to the reaction liquid at room temperature, followed by stirring at the same temperature for 8 hours. A saturated aqueous sodium hydrogen carbonate solution (20 mL) was added to the reaction mixture, followed by extraction with chloroform (30 mL). The organic layer was washed with saturated brine and then dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and then the residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=8/1) to obtain 2-fluoro-4-[(tetrahydro-2H-pyran-4-ylmethoxy)methyl]pyridine (132 mg).

1. temperaturecooling
2. stirringby stirring at the same temperature for 8 hours
3. extractionfollowed by extraction with chloroform (30 mL)
4. washThe organic layer was washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. customThe solvent was evaporated under reduced pressure
7. customthe residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate=8/1)