4-Chlorophenyl Isocyanate → 1-(4-Chloro-phenyl)-3-[3-(4-fluoro-2-methyl-2H-pyrazol-3-yl)-4-methoxy-phenyl]-urea

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Reaction Steps

3-(4-Fluoro-2-methyl-2H-pyrazol-3-yl)-4-methoxy-phenylamine (49 mg, 0.22 mmol) was dissolved in 3 mL of CH2Cl2, treated with 4-chlorophenylisocyanate (40 mg, 0.27 mmol), and stirred at room temperature overnight. The solvent was removed under reduced pressure, dissolved in DMSO (5 ml), and purified by preparative HPLC to afford Compound 27 as a white solid, 41 mg, 49% yield: LCMS m/z (%)=377 (M+H37Cl, 31), 375 (M+H35Cl, 100). 1H NMR (400 MHz, acetone-d6) δ: 8.77 (s, 1H), 8.67 (s, 1H), 7.66 (ddd, J1=9.0 Hz, J2=2.6 Hz, 1H), 7.60 (d, J=9.2 Hz, 2H), 7.54 (d, J=2.8 Hz, 1H), 7.38 (d, JH,F=4.4 Hz, 1H), 7.27 (d, J=8.8 Hz, 2H), 7.12 (d, J=8.8 Hz, 1H), 3.83 (s, 3H), 3.65 (s, 3H). 19F NMR (376 MHz, acetone-d6) δ: −177.39 (d, JH,F=5.3 Hz, 1F).

Provenance & Evidence