Lithium Hydroxide → 2-(6-chloro-benzothiazol-2-ylamino)-1-methyl-1H-benzimidazole-5-carboxylic acid

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2-(6-Chloro-benzothiazol-2-ylamino)-1-methyl-1H-benzoimidazole-5-carboxylic acid (250 mg) was prepared by following General Procedure E starting from 2-(6-chloro-benzothiazol-2-ylamino)-1-methyl-1H-benzoimidazole-5-carboxylic acid methyl ester (842 mg) and lithium hydroxide (379 mg). LC/MS: m/z 359.9. 1H NMR (DMSO-d6, 400 MHz): δ 8.12 (s, 1H), 7.92 (d, 1H), 7.83 (d, 1H), 7.55 (s, 1H), 7.48 (d, 1H), 7.38 (dd, 1H), 3.65 (s, 3H), —COOH and —NH proton signal was not observed.

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