反应详情

To an ice-cold, stirred solution of Methyl 3-bromo-5-(butylamino)-4-hydroxybenzoate (440 mg) and sodium bicarbonate (280 mg) in 1:1 isobutyl methyl ketone/water (10 mL) was added chloroacetyl chloride (226 mg). The mixture was stirred for 1 h, warmed to room temperature, and heated at reflux for 14 h. The mixture was cooled to room temperature, diluted with chloroform, and the layer separated. The organic layer was washed with water, and brine, dried (magnesium sulfate), filtered, and concentrated under reduced pressure to give a white solid: 1H NMR (300 MHz, CDCl3) δ 7.94, 7.62, 4.76, 3.98, 3.93, 1.65, 1.43, 0.97, which was used in the next step without further purification or characterization.

1. temperatureheated
2. temperatureat reflux for 14 h
3. temperatureThe mixture was cooled to room temperature
4. customthe layer separated
5. washThe organic layer was washed with water, and brine
6. dry with materialdried (magnesium sulfate)
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customto give a white solid
10. custom1H NMR (300 MHz, CDCl3) δ 7.94, 7.62, 4.76, 3.98, 3.93, 1.65, 1.43, 0.97, which was used in the next step without further purification or characterization