反应详情

To a solution of 2-bromo-5-methoxybenzoic acid (21.6 mmol) in DMF (20 mL) was added N,N-carbonyldiimidazole (54.1 mmol). The reaction mixture was allowed to stir at rt for 30 min and then ammonium carbonate (97.4 mmol) was added in portions over several minutes. The reaction mixture was allowed to stir until for 5 days and then poured into water. A white precipitate formed. The mixture was extracted with EtOAc. The organic solutions were combined, washed sequentially with water, 1N HCl, sat. aq. NaHCO3 and brine, dried over Na2SO4 filtered and concentrated to give 2-bromo-5-methoxybenzamide (18.5 mmol, 85%), which was used without further purification.

1. stirringto stir until for 5 days
2. customA white precipitate formed
3. extractionThe mixture was extracted with EtOAc
4. washwashed sequentially with water, 1N HCl, sat. aq. NaHCO3 and brine
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated