反应详情

Ethyl bromoacetate (0.240 mL) was added to a solution of 3-[4-(1H-benzimidazol-2-yloxy)phenyl]-1-ethyl-1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (400 mg) and sodium hydride (86 mg) in DMF (2 mL) at room temperature. The mixture was stirred at room temperature under a dry atmosphere (CaCl2 tube) for 2 h. The reaction mixture was diluted with MeOH (5 mL), and concentrated under reduced pressure. The residue was purified by column chromatography (silica gel, eluted with 0%-50% EtOAc in hexane) to give ethyl {2-[4-(1-ethyl-2-oxo-1,2-dihydro-3H-imidazo[4,5-b]pyridin-3-yl)phenoxy]-1H-benzimidazol-1-yl}acetate (480 mg) as off-white crystals.

1. concentrationconcentrated under reduced pressure
2. customThe residue was purified by column chromatography (silica gel, eluted with 0%-50% EtOAc in hexane)