[N:1]1([CH2:10][C:11]2[CH:20]=[CH:19][C:14]([C:15]([O:17]C)=[O:16])=[CH:13][CH:12]=2)[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[CH:2]1.[Li+].[OH-].Cl>O1CCOCC1>[N:1]1([CH2:10][C:11]2[CH:20]=[CH:19][C:14]([C:15]([OH:17])=[O:16])=[CH:13][CH:12]=2)[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[CH:2]1A solution of methyl 4-((1H-benzo[d]imidazol-1-yl)methyl)benzoate (0.25 mmol) in dioxane (1 mL) was treated with aqueous LiOH (1 M, 1.0 mL). After stirring at 23° C. for 2 h, the reaction was neutralized with aqueous HCl (1 M, 2.0 mL) and the resulting solid was isolated by filtration. The filter cake was rinsed with water and allowed to dry in vacuo to yield 4-((1H-benzo[d]imidazol-1-yl)methyl)benzoic acid.
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