反应详情

温度

50 °C

2-Oxo-1,2-dihydropyridine-4-carboxylic acid (2.00 g, 14.4 mmol) obtained in Step 1 was dissolved in DMF (29 mL), and potassium carbonate (7.95 g, 57.6 mmol) and benzyl bromide (5.13 mL, 43.2 mmol) were added thereto, followed by stirring at 50° C. for 2 hours. Water was added to the reaction mixture, followed by extraction with ethyl acetate. The organic layer was washed with a saturated aqueous solution of sodium chloride and dried over anhydrous magnesium sulfate, and then the solvent was distilled away under reduced pressure. The resulting residue was purified through silica gel column chromatography (hexane:ethyl acetate=2:1) to afford benzyl 1-benzyl-2-oxo-1,2-dihydropyridine-4-carboxylate (1.58 g, 34%) as a white solid.

1. extractionfollowed by extraction with ethyl acetate
2. washThe organic layer was washed with a saturated aqueous solution of sodium chloride
3. dry with materialdried over anhydrous magnesium sulfate
4. distillationthe solvent was distilled away under reduced pressure
5. customThe resulting residue was purified through silica gel column chromatography (hexane:ethyl acetate=2:1)