反应详情

4-Iodophthalimide (358 mg, 1.31 mmol) obtained in Step 1 was dissolved in DMF (6.7 mL), and the mixture was stirred at room temperature for 4.5 hours after adding potassium carbonate (272 mg, 1.97 mmol) and methyl iodide (0.10 mL, 1.57 mmol). The mixture was further stirred for 45 minutes after adding potassium carbonate (544 mg, 3.94 mmol) and methyl iodide (1.0 mL, 15.7 mmol). Thereafter, water and ethyl acetate were added to the mixture to separate the organic layer. The organic layer was dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. The resulting residue was then purified by silica gel column chromatography to give 4-iodo-N-methylphthalimide (180 mg, 48%).

1. stirringThe mixture was further stirred for 45 minutes
2. customto separate the organic layer
3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
4. customthe solvent was evaporated under reduced pressure
5. customThe resulting residue was then purified by silica gel column chromatography