4-hydroxy-3-[1-oxo-2-(2,5-dimethoxyphenyl)ethyl]-1-phenyl-1,8-naphthyridin-2(1H)-one 、
一水合肼 以
N,N-二甲基甲酰胺 为溶剂,
以to give 3-(2,5-dimethoxybenzyl)-5-phenyl-1H-pyrazolo[4,3-c][1,8]naphthyridin-4 (5H)-one (162 mg, 82%)的产率得到3-(2,5-dimethoxybenzyl)-5-phenyl-1H-pyrazolo[4,3-c][1,8]naphthyridin-4(5H)-one