反应详情

To a mixture of 2-[(3-chloropropyl)amino]-4-methoxy-3-nitrobenzoic acid (1.77 g, 6.13 mmol) and potassium carbonate (847 mg, 6.13 mmol) in N,N-dimethylformamide (18 mL) was added iodomethane (0.38 mL, 6.10 mmol) at room temperature. After stirring at room temperature for 14 hr, water was added to the reaction mixture and the mixture was extracted with ethyl acetate. The organic layer was washed with water (×5) and brine, dried over anhydrous magnesium sulfate, and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture to give the title compound (1.60 g, 5.29 mmol, 86%) as a yellow amorphous.

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with water (×5) and brine
3. dry with materialdried over anhydrous magnesium sulfate
4. concentrationconcentrated in vacuo
5. customThe residue was purified by flash column chromatography on silica gel eluting with a 10-50% ethyl acetate/n-hexane gradient mixture