反应详情

To a stirred solution of intermediate tert-butyl 6-bromo-4-[(3,3,3-trifluoropropyl)amino]-1H-benzimidazole-1-carboxylate (7.63 g, 18.69 mmol) in DCM (200 mL) at -rt was added water (20 mL) and TFA (200 mL). After stirring for 2 h, the solution was concentrated, ethyl acetate was added and the organic phase was washed with sodium carbonate solution and water. Evaporation of the yielded 5.17 g 6-bromo-N-(3,3,3-trifluoropropyl)-1H-benzimidazol-4-amine (89.8%).

1. concentrationthe solution was concentrated
2. additionethyl acetate was added
3. washthe organic phase was washed with sodium carbonate solution and water
4. customEvaporation of the yielded 5.17 g 6-bromo-N-(3,3,3-trifluoropropyl)-1H-benzimidazol-4-amine (89.8%)