trifluoracetic acid-dichloromethane 、
4-{4-[4-(5-methyl-tetrazol-1-yl)-phenoxy]-pyrazolo[3,4-d]pyrimidin-1-yl}-piperidine-1-carboxylic acid tert-butyl ester 在
乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 0.42h,
以to give 4-{4-[4-(5-methyl-tetrazol-1-yl)-phenoxy]-pyrazolo[3,4-d]pyrimidin-1-yl}-piperidine-1-carboxylic acid trifluoro-acetate salt (493 mg, 98%) as a white solid的产率得到4-{4-[4-(5-methyl-tetrazol-1-yl)-phenoxy]-pyrazolo[3,4-d]pyrimidin-1-yl}-piperidine-1-carboxylic acid trifluoroacetate