3-Fluoro-4-(methylsulfonyl)phenol → 4-(3-fluoro-4-methanesulfonyl-phenoxy)-1-[1-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-piperidin-4-yl]-1H-pyrazolo[3,4-d]pyrimidine

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Reaction Steps

4-(3-Fluoro-4-methanesulfonyl-phenoxy-1-[1-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-piperidin-4-yl]-1H-pyrazolo[3,4-d]pyrimidine was prepared using the procedure described for the preparation of 4-(2-fluoro-4-methanesulfonyl-phenoxy)-1-[4-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidine (Example 131) by the reaction of 4-(4-chloro-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid tert-butyl ester (Intermediate 19) with 3-fluoro-4-methanesulfonyl-phenol (Intermediate 2) in dimethylformamide. The product was purified by flash chromatography, eluting with 5% methanol/dichloromethane to give 4-(3-fluoro-4-methanesulfonyl-phenoxy)-1-[1-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-piperidin-4-yl]-1H-pyrazolo[3,4-d]pyrimidine (12 mg, 22%) as a white solid. Mass spectrum: Observed 501.9.

Provenance & Evidence