反应详情

To a solution of tert-butyl (R)-3-hydroxymethylpiperidine-1-carboxylate (11.50 g, 53.7 mmol) in N,N-dimethylformamide (110 ml) was added sodium hydride (3.22 g, 80.6 mmol) under ice-cooling, and the mixture was stirred at room temperature for 20 min. To the reaction mixture was added methyl iodide (4.35 ml, 69.9 mmol) under ice-cooling, and the mixture was stirred at room temperature for 1 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. After filtration, the solvent was evaporated under reduced pressure, and the obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1) to give tert-butyl (R)-3-methoxymethylpiperidine-1-carboxylate (13.00 g, yield 100%).

1. temperaturecooling
2. temperaturecooling
3. stirringthe mixture was stirred at room temperature for 1 hr
4. extractionthe mixture was extracted with ethyl acetate
5. washThe organic layer was washed with saturated brine
6. dry with materialdried over anhydrous sodium sulfate
7. filtrationAfter filtration
8. customthe solvent was evaporated under reduced pressure
9. customthe obtained residue was purified by silica gel column chromatography (hexane:ethyl acetate=1:1)