7-乙基-1H-吲唑-3-羧酸 、 4,5,6,7-tetrahydrooxazolo[4,5-c]pyridine hydrochloride 在
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
N,N-二甲基甲酰胺 为溶剂,
以100 %的产率得到(6,7-dihydro-4H-oxazolo[4,5-c]pyridin-5-yl)(7-ethyl-1H-indazol-3-yl)methanone