Br[CH2:2][CH2:3][O:4][NH:5][C:6]([C:8]1[CH:9]=[N:10][N:11]2[CH:16]=[CH:15][C:14]([N:17]3[CH2:21][CH2:20][CH2:19][C@@H:18]3[C:22]3[C:23]([O:29]C)=[N:24][CH:25]=[C:26]([F:28])[CH:27]=3)=[N:13][C:12]=12)=[O:7].[ClH:31]>CO>[Cl:31][CH2:2][CH2:3][O:4][NH:5][C:6]([C:8]1[CH:9]=[N:10][N:11]2[CH:16]=[CH:15][C:14]([N:17]3[CH2:21][CH2:20][CH2:19][C@@H:18]3[C:22]3[C:23](=[O:29])[NH:24][CH:25]=[C:26]([F:28])[CH:27]=3)=[N:13][C:12]=12)=[O:7]A mixture of (R)-N-(2-bromoethoxy)-5-(2-(5-fluoro-2-methoxypyridin-3-yl)pyrrolidin-1-yl)pyrazolo[1,5-a]pyrimidine-3-carboxamide (70 mg, 0.146 mmol) and HCl (4 N dioxane, 3.65 mL, 14.6 mmol) was sealed in a pressure tube and heated at 90° C. for 3 hours. The reaction mixture was then cooled, diluted with MeOH, concentrated, and dried on high vacuum to obtain the desired product which was used in the next step directly without further purification, assuming quantitative conversion.
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