4-(2-fluoro-4-methanesulfonyl-phenoxy)-1-[4-(3-isopropyl-[1,2,4]oxadiazol-5-yl)-cis-cyclohexyl]-1H-pyrazolo[3,4-d]pyrimidine 、
tert-butyl 4-(4-chloro-1H-pyrazolo[3,4-d]pyrimidin-1-yl)piperidine-1-carboxylate 、
3-氟-4-(甲基亚磺酰基)苯酚 在
4-[4-(3-fluoro-4-methanesulfonyl-phenoxy)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester 、 ethyl acetate hexanes 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以to give 4-[4-(3-fluoro-4-methanesulfonyl-phenoxy)pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester (75 mg, 43%) as a white solid的产率得到4-[4-(3-fluoro-4-methanesulfonyl-phenoxy)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester