反应详情

6-Methoxy-1H-benzoimidazole-2-thiol (10.00 g, 55.56 mmol) was dissolved in DMF (300 mL). NaH (2.44 g, 60 w/w % in mineral oil, 61.11 mmol) was added in small portions at room temperature. The resulted mixture was stirred for one h then bromo-acetic acid ethyl ester (10.21 g, 61.11 mmol) was added. After 12 h the mixture was evaporated and the resulted slurry was diluted with HCl (340 mL, 2N) and was stirred for a 0.5 h at room temperature then was filtered, washed with water and n-hexane respectively. The title compound (14.70 g, 99%) was isolated as a pale yellow powder.

1. customAfter 12 h the mixture was evaporated
2. additionthe resulted slurry was diluted with HCl (340 mL, 2N)
3. stirringwas stirred for a 0.5 h at room temperature
4. filtrationthen was filtered
5. washwashed with water and n-hexane respectively