Hydrochloric Acid → 6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-(tetrahydro-pyran-2-ylmethyl)-3H-benzoimidazole-5-carboxylic acid (2-hydroxy-ethoxy)-amide

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Reaction Steps

6-(4-Bromo-2-chloro-phenylamino)-7-fluoro-3-(tetrahydro-pyran-2-ylmethyl)-3H-benzoimidazole-5-carboxylic acid (2-vinyloxy-ethoxy)-amide 11s (0.039 g, 0.068 mmol) is dissolved in ethanol (2 mL) and aqueous 2 M HCl (200 uL) is added. The reaction mixture is stirred at room temperature for 30 minutes. The reaction mixture is diluted with water and then neutralized with aqueous 2 M NaOH (˜200 uL) until pH 7 and concentrated under reduced pressure. The residue is partitioned between ethyl acetate and brine in a separatory funnel and the layers separated. The ethyl acetate layer is dried (Na2SO4) and concentrated under reduced pressure to yield 0.034 g (91%) of the pure desired product as an off-white solid. MS ESI (+) m/z 541, 543 (M+, Br pattern) detected; 1H NMR (400 MHz, CD3OD) δ 8.29 (s, 1H), 7.75 (s, 1H), 7.49 (d, 1H), 7.18 (dd, 1H), 6.40 (dd, 1H), 4.40 (dd, A of ABX pattern, 1H), 4.28 (dd, B of ABX pattern, 1H), 3.92 (m, X of ABX pattern, 1H), 3.66 (t, 2H), 3.35 (m, 1H), 1.89 (m, 1H), 1.76 (m, 1H), 2.28 (s, 3H), 1.54 (m, 3H), 1.30 (m, 1H). 19F NMR (376 MHz, CD3OD) −134.87 (s).

Provenance & Evidence