Ethenone, (trimethylsilyl)-

反応条件: temp:23.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

実験手順: A solution of 2-bromo-N-[(1E)-(dimethylamino)methylidene]-N′-(3-fluoro-4-methylphenyl)benzenecarboximidamide (1-3, 500 mg, 1.38 mmol, 1.0 equiv) in ethyl acetate (5 mL) was treated with a solution of (trimethylsilyl)ketene (0.39 mL, 2.76 mmol, 2 equiv) in toluene (5 mL). The reaction mixture was stirred at 23° C. for 5 days. The resulting mixture was concentrated, and the residue was purified via reverse-phase HPLC (Acetonitrile:H2O gradient with 0.1% TFA present) to afford 2-(2-bromophenyl)-3-(3-fluoro-4-methylphenyl)pyrimidin-4(3H)-one (1-4) as a dark orange solid. 1H NMR (500 MHz, CD3OD) δ 8.12 (d, 1H, J=6.8 Hz), 7.53 (d, 1H, J=7.8 Hz), 7.46 (d, 1H, J=7.6 Hz), 7.32 (t, 1H, J=7.6 Hz), 7.24 (t, 1H, J=7.8 Hz), 7.20-7.08 (m, 3H), 6.67 (d, 1H, J=6.6 Hz), 2.19 (s, 3H). The resulting mixture was concentrated the residue was purified via reverse-phase HPLC (Acetonitrile:H2O gradient with 0.1% TFA present)