反应详情

温度

100 °C

To 3-amino-4-(2-chloroethylamino)-benzoic acid methyl ester (11.0 g, 0.0482 mol) was added HCO2H (30 mL) and heated at 100° C. for 1 h. The reaction was cooled to ambient temperature and diluted with ice water (100 mL). The pH of the reaction mixture was adjusted to 7 with NaHCO3 and the solid precipitated was filtered, washed with water and dried under vacuum to get a pale green solid (9.9 g, 86%) of 1-(2-chloroethyl)-1H-benzimidazole-5-carboxylic acid methyl ester. MS-ESI m/z 239 (M+1).

1. temperatureThe reaction was cooled to ambient temperature
2. customthe solid precipitated
3. filtrationwas filtered
4. washwashed with water
5. customdried under vacuum