反应详情

3-(4-Fluoro-2-methyl-2H-pyrazol-3-yl)-4-methoxy-phenylamine was treated with 3-chlorophenylisocyanate, in a similar manner as described in Example 1.68. An additional purification by flash chromatography (SiO2, Hexanes/EtOAc gradient elution) was necessary, providing a 10 mg (27% yield) of Compound 83: LCMS m/z (%)=377 (M+H37Cl, 25), 375 (M+H35Cl, 100). 1H NMR (400 MHz, acetone-d6) δ: 8.28 (s, 1H), 8.16 (s, 1H), 7.80 (s, 1H), 7.64 (dd, J1=8.8 Hz, J2=2.8 Hz 1H), 7.48 (d, J=2.8 Hz, 1H), 7.38 (d, JH,F=4.8 Hz, 1H), 7.34 (dd, J1=9.2 Hz, J2=0.8 Hz, 1H), 7.26 (dd, J1=8.2, J2=8.2 Hz, 1H), 7.13 (d, J=8.8 Hz, 1H), 7.00 (dd, J1=8.8 Hz, J2=0.8 Hz, 1H), 3.83 (s, 3H), 3.65 (s, 3H). 19F NMR (376 MHz, acetone-d6) δ: −177.35 (d, JH,F=4.1 Hz, 1F).

1. customAn additional purification
2. washby flash chromatography (SiO2, Hexanes/EtOAc gradient elution)