Thionyl Chloride → 2-(5-nitro-2-thienyl)-1H-benzimidazole

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Reaction Steps

1.0 g of 2-(5-nitro-2-thienyl)-1H-benzimidazole-4-carboxylic acid is added into 15 ml of thionyl chloride; and to heat and reflux it for 60 minutes. After end of the reaction, 2-amino-1-p-chlorophenyl-1-propanol (1.1 eq) is dissolved into tetrahydrofuran, and then drop acyl chloride to the above tetrahydrofuran mixture under stirring at the room temperature and then filter inorganic salt, evaporate the solvent to dry, and then isolate the mixture through column chromatography to obtain 2-(5-nitro-2-thienyl)-1H-benzimidazole-4-(N-(1-hydroxymethyl-2-p-nitrophenylhydroxyethyl)amide. The yield is about 92%.

Provenance & Evidence