反应详情

To a stirred solution of 3-(4-Bromo-2-methyl-2H-pyrazol-3-yl)-4-methoxy-phenylamine (0.015 g, 0.051 mmol) in CH2Cl2 (1 mL) was added 3-chlorophenyl isocyanate (0.008 g, 7 μL, 0.054 mol, 1.05 equiv.). After the TLC showed the consumption of the starting material, it was isolated by preparative thin layer chromatography (TLC) (Eluent: EtOAc/Hexane=1/1) and Compound 20 (0.020 g, 0.047 mmol, 92%) was obtained as a solid film. LCMS m/z (%)=435 (M+H79Br, 68), 437 (M+H81Br, 100). 1H NMR (400 MHz, acetone-d6) δ: 8.29 (s, 1H), 8.19 (s, 1H), 7.80 (t, J=1.9 Hz, 1H), 7.29 (dd, J=2.7, 9.0 Hz, 1H), 7.49 (s, 1H), 7.43 (d, J=2.7 Hz, 1H), 7.34 (d, J=8.4 Hz, 1H), 7.26 (t, J=8.0 Hz, 1H), 7.14 (d, J=9.0 Hz, 1H), 7.00 (d, J=7.8 Hz, 1H), 3.82 (s, 3H), 3.68 (s, 3H).

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2. customit was isolated by preparative thin layer chromatography (TLC) (Eluent: EtOAc/Hexane=1/1)