HCID 23094072, compound → HCID 23094067, compound

Participants

Reaction Steps

Suspending 3.6 g (12 mmol) of 5′-bromo-2′-(N-phenylamino)-acetanilide obtained in the above step (1) into 30 milliliter of xylene, and adding 0.68 g (3.6 mmol) of p-toluenesulfonic acid 1 hydrate, the resultant solution was azeotropically dehydrated while refluxing with heating for 5 hours. The reacted solution was cooled down to room temperature, and the solvent was removed by distillation. Dissolving the resultant solid into ethyl acetate, and after sequentially washing with water, with 10% potassium carbonate aqueous solution and with saturated solution of sodium chloride, it was dried with sulfuric anhydride magnesium, followed by removing the solvent by distillation under reduced pressure, 3.0 g of 5-bromo-2-methyl-1-phenyl-1H-benzimidazole was obtained (yield: 90%).

Provenance & Evidence