反应详情

温度

25 °C

To a mixture of 2,3,6-trichloro-5-nitropyridine (2.61 g, 11.4 mmol) and DIEA (1.90 ml, 11.4 mmol) in THF (50 ml) was added the 5-isopropoxy-1H-pyrazol-3-amine (1.20 g, 8.50 mmol) at 0° C. After addition, the reaction mixture was stirred at 25° C. for 5 days. The solvent was removed under reduced pressure and the resulting residue was purified by column chromatography (hexane-EtOAc=2.5:1) to give the title compound as a yellow solid (0.77 g, 27%). 1H NMR (400 MHz) δ 12.26 & 11.64 (s, 1H), 10.42 & 10.04 (s, 1H), 8.81 & 8.77 (s, 1H), 6.02 & 5.94 (s, 1H), 4.70 & 4.48 (m, 1H), 1.32 (d, J=6.0 Hz, 3H), 1.27 (d, J=6.0 Hz, 1H). MS: Calcd.: 331. Found: [M+H]+ 332.

1. additionAfter addition
2. customThe solvent was removed under reduced pressure
3. customthe resulting residue was purified by column chromatography (hexane-EtOAc=2.5:1)