反应详情

Mix 3-bromo-4-fluoro-5-methanesulfonylbenzoic acid (1.6 g, 5.04 mmol), 1-(3-dimethylamino-propyl)-3-ethyl-carbodiimide hydrochloride (968 mg, 5.04 mmol) and 1-hydroxybenzotriazole (680 mg, 5.04 mmol) in DMF (20 mL) at room temperature for 20 min. Add methyl-propylamine (368 mg, 5.04 mmol) and triethylamine (520 mg, 15.1 mmol) and stir at room temperature for 1 h. Dilute with ethyl acetate, wash with 10% aqueous potassium carbonate, 0.1 N citric acid, 1 N lithium chloride and saturated aqueous sodium chloride, concentrate and purify (silica gel chromatography, eluting with 10:90 to 50:50 ethyl acetate:hexanes) to give the title compound as an oil.

1. washwash with 10% aqueous potassium carbonate, 0.1 N citric acid, 1 N lithium chloride and saturated aqueous sodium chloride
2. concentrationconcentrate
3. custompurify
4. wash(silica gel chromatography, eluting with 10:90 to 50:50 ethyl acetate:hexanes)