Cesium carbonate → N-(3-(5-cyano-2-methoxyphenyl)-1-(2-hydroxy-2-methylpropyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide

Participants

Reaction Conditions

Reaction Steps

To a solution of N-(5-(5-cyano-2-methoxyphenyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide (200 mg, 0.557 mmol) in 20 mL DMF was added isobutylene oxide (0.20 mL, 2.2 mmol) and cesium carbonate (363 mg, 1.11 mmol). The reaction mixture was stirred at 80° C. for 6 hours, then diluted with ethyl acetate and filtered, and the organic portion washed with brine, dried over magnesium sulfate, and concentrated. The crude product was purified by reverse phase HPLC and lyophilized to give 27.2 mg (11%) of desired product. LCMS (ESI) m+H=431.9. 1H NMR (CDCl3, 400 MHz): 69.68 (s, 1H), 8.78 (dd, J=2.0, 6.8 Hz, 1H), 8.71 (s, 1H), 8.56 (q, J=1.6 Hz, 1H), 8.37 (s, 1H), 7.87 (d, J=2.4 Hz, 1H), 7.72 (dd, J=2.0, 8.4 Hz, 1H), 7.1 (d, J=8.8 Hz, 1H), 7.01 (dd, J=4.4, 7.2 Hz, 1H), 4.11 (s, 2H), 3.91 (s, 3H), 1.23 (s, 6H).

Provenance & Evidence