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 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