Methanol → HCID 69131835, compound

Participants

Reaction Steps

7-methoxy-2-phenyl-1H-benzoimidazole-4-carboxylic acid (2.00 g, 7.46 mmol) obtained in step 4 was dissolved in 30 ml of methanol, H2SO4 (2.00 ml, 37.28 mmol) was added dropwise thereto and refluxed for 15 hours. The resulting solution was cooled to room temperature, concentrated under a reduced pressure to remove methanol, and the residue was neutralized with NaHCO3. Then, the neutralized residue was extracted with ethyl acetate and concentrated under a reduced pressure to obtain a residue which purified by recrystallization from CHCl3/MeOH/hexane to obtain the title compound (1.7 g, 5.89 mmol) in a yield of 83%.

Provenance & Evidence