Water → 1-[5-t-butyl-2-(3-oxo-indan-5-yl)-2H-pyrazol-3-yl]-3-(2,3-dichlorophenyl)urea

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Reaction Steps

To a solution of the 6-(5-amino-3-t-butyl-pyrazol-1-yl)indan-1-one (1.5 g, 5.6 mmol) in THF (30 mL) was added a solution of 1,2-dichloro-3-isocyanato-benzene (1.2 g, 6.4 mmol) in THF (5.0 mL) at 0° C. under N2. The resulting mixture was stirred at RT overnight then poured into H2O. The mixture was extracted with CH2Cl2 (3×100 mL). The combined organic layers were washed with brine, dried (Na2SO4), filtered, concentrated and purified via column chromatography to afford 1-[5-t-butyl-2-(3-oxo-indan-5-yl)-2H-pyrazol-3-yl]-3-(2,3-dichlorophenyl)urea as a solid (1.1 g, 43% yield). 1H NMR (300 MHz, DMSO-d6): δ 9.22 (s, 1H), 8.68 (s, 1H), 7.94 (t, J=5.1 Hz, 1H), 7.78 (d, J=7.8 Hz, 1H), 7.69-7.65 (m, 2H), 7.24 (d, J=4.8 Hz, 2H), 6.34 (s, 1H), 3.14-3.05 (m, 2H), 2.78-2.66 (m, 2H), 1.22 (s, 9H); MS (ESI) m/z: 457 (M+H+).

Provenance & Evidence