3-(6-Bromopyridin-2-yl)-5-(pyridin-3-yl)-1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazolo[3,4-c]pyridine 、
3-氧代-1-哌嗪羧酸叔丁酯 以to afford 8.0 mg (20%) of 301 over two steps的产率得到1-(6-(5-(pyridin-3-yl)-1H-pyrazolo[3,4-c]pyridine-3-yl)pyridin-2-yl)piperazin-2-one