反应详情

Ethyl-2-bromoisobutyric acid (3.7 ml, 24.99 mmol) and sodium bicarbonate (630 mg, 7.49 mmol) were added to 4-bromo-3,5-dimethyl-aniline (500 mg, 2.49 mmol), and the mixture was irradiated with microwaves at 130° C. for 15 minutes. The reaction mixture was diluted with ethyl acetate, and the organic layer was sequentially washed with water and saturated brine and concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate) to give ethyl 2-[(4-bromo-3,5-dimethyl-phenyl)amino]-2-methyl-propanoate (230 mg, 29%).

1. customthe mixture was irradiated with microwaves at 130° C. for 15 minutes
2. washthe organic layer was sequentially washed with water and saturated brine
3. concentrationconcentrated under reduced pressure
4. customThe resulting residue was purified by silica gel column chromatography (hexane-ethyl acetate)