2-(3,5-difluoro-N-[3-[[3-methoxy-4-(4-methylimidazol-1-yl)phenyl]methylidene]-2-oxopiperidin-1-yl]anilino)acetamide 在
phosphorus pentoxide 作用下,
以
2,3,4-三氟甲苯 为溶剂,
以50%的产率得到4-(3,5-difluorophenyl)-9-[[3-methoxy-4-(4-methylimidazol-1-yl)phenyl]methylidene]-3,6,7,8-tetrahydropyrido[1,2-b][1,2,4]triazin-2-one