(S)-1-methyl-3-(piperidin-3-yl)-5-(pyrazolo[1,5-a]pyridin-3-yl)-1H-imidazo[4,5-b]pyridin-2(3H)-one hydrochloride 、
1-氰基-1-环丙烷羧酸 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以100%的产率得到(S)-1-(3-(1-methyl-2-oxo-5-(pyrazolo[1,5-a]pyridin-3-yl)-1H-imidazo[4,5-b]pyridin-3(2H)-yl)piperidine-1-carbonyl)cyclopropanecarbonitrile