Sodium Carbonate → N-(1-methyl-4-(2-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide

Participants

Reaction Steps

To a stir-bar equipped microwave vial was added: N-(4-bromo-1-methyl-1H-pyrazol-3-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide (101 mg, 0.313 mmol, 1 eq), 2-trifluoromethylphenyl boronic acid (126.6 mg, 0.6666 mmol, 2.13 eq), bis(triphenylphosphine)palladium(II) chloride (26.8 mg, 0.0382 mmol, 0.12 eq), sodium carbonate (1.0 mL of a 2.0 M aqueous solution, 2 mmol, 6 eq), and 3 mL acetonitrile. The reaction mixture was subjected to microwave irradiation at 130° C. for 30 minutes. The reaction mixture was partitioned between ethyl acetate and water, 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 4.7 mg (4%) of N-(1-methyl-4-(2-(trifluoromethyl)phenyl)-1H-pyrazol-3-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide. LCMS (ESI) m+H=387.1; 1H NMR (400 MHz, DMSO-d6) δ: 9.58 (s, 1H), 9.32 (d, 1H), 8.74 (d, 1H), 8.57 (s, 1H), 7.78 (s, 1H), 7.74 (d, 1H), 7.60 (t, 1H), 7.49 (m, 2H), 7.28 (d of d, 1H), 3.87 (s, 3H).

Provenance & Evidence