反应详情

5-Bromo-3-formyl-4-methoxybenzoyl chloride (501 mg, 1.8 mmol) was dissolved in in dichloromethane (5 mL) and the solution was added dropwise to a vigorously stirring solution of N-butylsulfonamide (272 mg, 2.0 mmol), triethylamine (2.5 mmol) and a catalytic amount of N,N′-dimethylaminopyridine (10 mL in dichloromethane). The mixture was stirred at room temperature until the reaction was complete and concentrated under reduced pressure. The residue was partitioned between 5% citric acid and ethyl acetate. The organic layer was washed with water and brine, dried over anhydrous magnesium sulfate and the filtrate was evaporated to give 3-bromo-N-butyl-5-formyl-4-methoxy-benzenesulfonamide as a white solid (650 mg).

1. concentrationconcentrated under reduced pressure
2. customThe residue was partitioned between 5% citric acid and ethyl acetate
3. washThe organic layer was washed with water and brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customthe filtrate was evaporated