3-(5-bromo-6-fluoropyridin-2-yl)-5-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-c]pyridine 、
(R)-3-叔丁氧羰基氨基吡咯烷 以287 was obtained as an off-white solid (12.2 mg, 34%) over two steps的产率得到(R)-1-(3-bromo-6-(5-(pyridin-3-yl)-1H-pyrazolo[3,4-c]pyridine-3-yl)pyridin-2-yl)pyrrolidine-3-amine