[Br:1][C:2]1[CH:3]=[C:4]([C:8]2[N:12](CCOC[Si](C)(C)C)[N:11]=[CH:10][C:9]=2[NH:21][C:22]([C:24]2[CH:25]=[N:26][N:27]3[CH:32]=[CH:31][CH:30]=[N:29][C:28]=23)=[O:23])[CH:5]=[CH:6][CH:7]=1.Cl>C(O)C.O>[Br:1][C:2]1[CH:3]=[C:4]([C:8]2[NH:12][N:11]=[CH:10][C:9]=2[NH:21][C:22]([C:24]2[CH:25]=[N:26][N:27]3[CH:32]=[CH:31][CH:30]=[N:29][C:28]=23)=[O:23])[CH:5]=[CH:6][CH:7]=1To a solution of N-(5-(3-bromophenyl)-1-(2-((trimethylsilyl)methoxy)ethyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide (742 mg, 1.45 mmol) in 20 mL of ethanol was added HCl (1.0 mL of a 6 M solution in water, 6 mmol). The reaction mixture was then stirred at 70° C. for 6 hours. After cooling to room temperature a light yellow precipitate formed, which was isolated by filtration and washed with methanol and diethyl ether. The filtrate was reduced in volume, and more solid product filtered. The combined collected solids were dried under vacuum to yield 320 mg (58%) of N-(5-(3-bromophenyl)-1H-pyrazol-4-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide. LCMS (ESI) m+H=383.0; 1H NMR (400 MHz, DMSO-d6) δ13.01 (s, 1H), 9.93 (s, 1H), 9.33 (dd, 1H), 8.83 (dd, 1H), 8.66 (d, 1H), 8.26 (s, 1H), 7.57 (d, 1H), 7.47 (t, 1H), 7.28 (dd, 1H).
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