反应详情

温度

85 °C

To a solution of 6.1 g of (5-(benzyloxy)-4-oxo-1,4-dihydropyridin-2-yl)methyl acetate in 50 mL of dimethyl sulfoxide, 5.0 g of tert-butyl (2-bromoethyl)carbamate and 10 g of potassium carbonate were added, and the mixture was stirred at 80 to 90° C. for 6 hours 30 minutes. The reaction mixture was cooled to room temperature, and ethyl acetate and water were then added thereto. The organic layer was separated, washed with water and dried over anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The resultant residue was purified by flash silica gel column chromatography using gradient elution with chloroform:methanol=99:1 to 98:2 obtain 3.8 g of (5-(benzyloxy)-4-(2-((tert-butoxycarbonyl)amino)ethoxy)pyridin-2-yl)methyl acetate as a brown oily substance.

1. temperatureThe reaction mixture was cooled to room temperature
2. customThe organic layer was separated
3. washwashed with water
4. dry with materialdried over anhydrous magnesium sulfate
5. distillationthe solvent was distilled off under reduced pressure
6. customThe resultant residue was purified by flash silica gel column chromatography
7. washelution with chloroform