反应详情

To a stirred solution of ethyl 3-benzyl-3H-benzo[d]imidazole-5-carboxylate (0.12 g, 0.43 mmol) in ethanol (10 mL) was added NaOH (0.12 g in 2 mL of H2O) and then the solution was stirred for 24 hr at room temperature. The reaction solution was then concentrated, diluted with water (10 mL) and then the pH was adjusted to ˜5 using 1N HCl. The aqueous layer was then saturated with NaCl and extracted with ethyl acetate (2×50 mL). Then organic layer was dried (MgSO4), filtered and then concentrated to provide 0.1 g (93%) of 3-benzyl-3H-benzo[d]imidazole-5-carboxylic acid as an off-white solid.

1. concentrationThe reaction solution was then concentrated
2. additiondiluted with water (10 mL)
3. extractionsaturated with NaCl and extracted with ethyl acetate (2×50 mL)
4. dry with materialThen organic layer was dried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated