Methyl iodide → 1-cyclopropyl-5,6-difluoro-2-[5-(2-methoxypropan-2-yl)pyridin-3-yl]-1H-benzimidazole

Participants

Reaction Steps

To a cooled (0° C.) solution of 2-[5-(1-Cyclopropyl-5,6-difluoro-1H-benzimidazol-2-yl)pyridin-3-yl]propan-2-ol (from Example 38 Step E) (0.086 g, 0.26 mmol) in tetrahydrofuran (1.3 mL) was added sodium hydride (60% dispersion in mineral oil, 0.026 g, 0.65 mmol). After 1 hour, iodomethane (0.024 mL, 0.389 mmol) was added. The reaction was then warmed to room temperature and stirred overnight. The reaction mixture was diluted with ethyl acetate, washed with water and brine, dried over magnesium sulfate, filtered and concentrated. Purification by flash chromatography on silica gel (30-60% ethyl acetate in hexanes) provided the title compound: LCMS m/z 344.03 [M+H]+; 1H NMR (500 MHz, CDCl3) δ 9.09 (d, J=1.9 H, 1 H), 8.79 (d, J=2.0 Hz, 1 H), 8.29 (t, J=2.0, 2.0 Hz, 1 H), 7.58 (dd, J=10.3, 7.3 Hz, 1 H), 7.40 (dd, J=9.7, 7.1 Hz, 1 H), 3.59-3.57 (m, 1 H), 3.16 (s, 3 H), 1.63 (s, 3 H), 1.60 (s, 3 H), 1.20-1.17 (m, 2 H), 0.79-0.76 (m, 2 H).

Provenance & Evidence