Methanol → (E)-3-{4-[6-(4-tert-butylphenylcarbamoyl)-1H-benzimidazol-2-yl]-3,5-dimethylphenyl}-acrylic acid

Participants

Reaction Steps

A mixture of methyl (E)-3-{4-[6-(4-tert-butylphenylcarbamoyl)-1H-benzimidazol-2-yl]-3,5-dimethylphenyl}-acrylate (200 mg, 420 μmol), 1N NaOH (520 μL), and methanol (260 μL) was diluted with 3 mL of water/methanol (2:1) and stirred at ambient temperature for 18 h. The solution was then quenched with 1N HCl (520 μL), filtered, and the precipitate washed with water and dried, to yield (E)-3-{4-[6-(4-tert-butylphenylcarbamoyl)-1H-benzimidazol-2-yl]-3,5-dimethylphenyl}-acrylic acid. 1H-NMR (DMSO-d6, 400 MHz): δ 8.31 (s, broad, 1H), 7.87 (d, J=8.3 Hz, 1H), 7.74 (d, J=8.7 Hz, 2H), 7.67 (m, 1H), 7.58 (m, 3H), 7.37 (d, J=8.7 Hz, 2H), 6.63 (d, J=16.2 Hz, 1H), 2.15 (s, 6H), 1.29 (s, 9H). MS (ESI) m/z 468.2 (M+H): Retention time=1.24 min (Method 10).

Provenance & Evidence