ethyl 4,6-difluoropyrazolo[1,5-a]pyridine-3-carboxylate 在
potassium trimethylsilonate 、
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
四氢呋喃 、
二氯甲烷 为溶剂,
反应 24.5h,
生成 (S)-(4,6-difluoropyrazolo[1,5-a]pyridin-3-yl)(2,7-dimethyl-3-(1-methyl-3-(trifluoromethyl)-1H-pyrazol-5-yl)-2,4,5,7-tetrahydro-6H-pyrazolo[3,4-c]pyridin-6-yl)methanone