Potassium Carbonate → HCID 58851551, compound

Participants

Reaction Conditions

Reaction Steps

To a stirring solution of 1-(3-t-butyl-1-(3-(2-(2,2,2-trifluoro-acetamido)ethyl)phenyl)-1 H-pyrazol-5-yl)-3-(2,3-dichloro-phenyl)urea (0.134 g, 0.264 mmol) in MeOH (10 mL) and H2O (0.6 mL) at RT was added K2CO3 (0.182 g, 1.32 mmol). The resulting suspension was stirred at 60-65° C. for 2 h, then cooled to RT and the volatiles evaporated. The residue was carefully dissolved in 1N HCl to pH 1-2 and extracted with Et2O (2×). The aqueous was then basified (pH 13-14) with 3M NaOH and extracted with CH2Cl2 (4×). The combined CH2Cl2 extracts were washed with brine (1×), dried (Na2SO4), filtered, and concentrated to provided 1-{1-[3-(2-aminoethyl)phenyl]-3-t-butyl-1H-pyrazol-5-yl}-3-(2,3-dichlorophenyl)urea as a foam (25.6 mg, 97% yield). 1H NMR (400 MHz, CDCl3): δ 8.17 (dd, J=1.2, and 8.0 Hz, 1H), 7.31-7.28 (m, 4H), 7.14-7.06 (m, 4H), 6.45 (s, 1H), 3.48 (brt, J=4.4 Hz, 2H), 3.46-3.39 (m, 2H), 2.86 (t, J=7.0 Hz, 2H), 1.3 (s, 9H); MS (ESI) m/z: 446.3 (M+H+).

Provenance & Evidence