3-{(3R)-3-[(5-fluoro-6-piperazin-1-yl-2-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-4-yl)amino]piperidin-1-yl}-3-oxopropanenitrile 、
2-(dimethylamino)ethyl 4-formylbenzoate 在
三乙酰氧基硼氢化钠 作用下,
以
二氯甲烷 为溶剂,
以14%的产率得到2-(dimethylamino)ethyl 4-{[4-(6-{[(3R)-1-(cyanoacetyl)piperidin-3-yl]amino}-5-fluoro-2-pyrazolo[1,5-a]pyridin-3-ylpyrimidin-4-yl)piperazin-1-yl]methyl}benzoate