Diisopropylethylamine → (5-Isobutyl-isoxazol-3-yl)-{4-[4-(4-methanesulfonyl-phenoxy)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidin-1-yl}-methanone

Participants

Reaction Steps

(5-Isobutyl-isoxazol-3-yl)-{4-[4-(4-methanesulfonyl-phenoxy)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidin-1-yl}-methanone (8 mg, 12%) was prepared as a white solid using the conditions described in Example 152, by the reaction of 4-(4-methanesulfonyl-phenoxy)-1-piperidin-4-yl-1H-pyrazolo[3,4-d]pyrimidine trifluoroacetate salt (Intermediate 27, 63 mg, 0.13 mmol) with 5-isobutyl-isoxazole-3-carboxylic acid (Matrix Scientific, Columbia, S.C., USA; 26 mg, 0.15 mmol) in the presence of TSTU (O—(N-succinimidyl)-1,1,3,3-tetramethyluronium tetrafluoroborate; 78 mg, 0.26 mmol) and diisopropylethylamine (0.14 mL, 0.8 mmol).

Provenance & Evidence