反应详情

To a solution of NaH (204 mg, 8.49 mmol) in DMF (5 mL) was added 1-methyl-1H-benzo[d]imidazol-5-ol (420 mg, 2.83 mmol) at 28° C. After being stirred for 5 minutes, ethyl 2-bromoacetate (568 mg, 3.4 mmol) was added and the resulting mixture stirred for a further 16 h under the reaction was complete by TLC. The mixture was treated with water (50 mL) and extracted with ethyl acetate (2×20 mL). The water layer was treated with 2N HCl until pH 3 and extracted with ethyl acetate (2×20 mL). The combined organic layers were washed with brine (30 mL), dried over Na2SO4 and concentrated to give the product (160 mg, 24.1%) as white solid which was used in next step without further purification. LCMS (m/z): 207.1 (M+1).

1. stirringthe resulting mixture stirred for a further 16 h under the reaction
2. extractionextracted with ethyl acetate (2×20 mL)
3. additionThe water layer was treated with 2N HCl until pH 3
4. extractionextracted with ethyl acetate (2×20 mL)
5. washThe combined organic layers were washed with brine (30 mL)
6. dry with materialdried over Na2SO4
7. concentrationconcentrated