反应详情

温度

65 °C

2-(4-Iodo-2-methoxy-pyridin-3-yl)-5-methyl-3H-imidazole-4-carboxylic acid ethyl ester (0.020 g, 0.052 mmol) was dissolved in acetic acid (1 mL) and concentrated hydrochloric acid (1 mL) and this mixture was stirred at reflux for 2 hours. The mixture was then evaporated and the residue was dissolved in N,N-dimethylformamide (2 mL) and treated with triethylamine (˜22 μL, 0.155 mmol) and the hydrochloric acid salt of (S)-2-amino-1-[3-chlorophenyl]ethanol (0.020 g, 0.096 mmol). The mixture was heated at 65° C. overnight, then the solvent was evaporated and the residue was purified by Prep HPLC (ammonium acetate/acetonitrile/water) to give the title compound (0.003 g, 14%) as a white solid. HPLC 100% (220 nm), LCMS (+ESI, M+H+) m/z 417; 1H NMR (400 MHz, methanol-d4) δ (ppm) (mixture of tautomers): 1.40 and 1.43 (3H, 2t, J=7.1 Hz), 2.49 and 2.61 (3H, 2s), 3.61-3.72 (2H, m), 4.35 and 4.39 (2H, q, J=7.1 Hz), 4.95-4.97 (1H, m), 6.21 and 6.23 (1H, 2d, J=7.6 Hz), 7.19-7.55 (5H, m).

1. temperatureat reflux for 2 hours
2. customThe mixture was then evaporated
3. dissolutionthe residue was dissolved in N,N-dimethylformamide (2 mL)
4. customthe solvent was evaporated
5. customthe residue was purified by Prep HPLC (ammonium acetate/acetonitrile/water)