4-Fluorobenzaldehyde → HCID 86672712, compound

Participants

Reaction Steps

To a stirred solution of methyl 3-amino-2-(2,2-dimethoxyethylamino)benzoate (1.0 g, 3.9 mmol) from Step C of Example 13 in DMF (9 mL) and H2O (0.3 mL) were added oxone (1.6 g, 2.6 mmol) and 4-fluorobenzaldehyde (0.5 mL, 4.3 mmol) and the mixture was stirred overnight at room temperature. The reaction mixture was washed with saturated aqueous sodium bicarbonate, re-extracted with methylene chloride, dried (Na2SO4), filtered, and concentrated under reduced pressure to give the crude material which was purified by column chromatography (silica gel, 5% to 100% ethyl acetate in hexanes) to afford methyl 1-(2,2-dimethoxyethyl)-2-(4-fluorophenyl)-1H-benzo[d]imidazole-7-carboxylate (1.1 g, 79%): 1H NMR (500 MHz, CDCl3) δ7.97 (dd, J=8.0, 1.0 Hz, 1H), 7.80 (dd, J=8.0, 1.0 Hz, 1H), 7.73-7.70 (m, 2H), 7.32 (t, J=8.0 Hz, 1H), 7.24-7.20 (m, 2H), 4.72 (d, J=5.0 Hz, 2H), 4.24 (t, J=5.0 Hz, 1H), 3.94 (s, 3H), 3.38-3.33 (m, 1H), 3.19 (s, 6H); MS (ESI+) m/z 359 (M+H).

Provenance & Evidence