1-(4-nitro-phenyl)-4-(2,2,2-trichloro-acetyl)-piperidine-2,3-dione 、
(4-甲氧基苯基)肼 以
glacial acetic acid methyl alcohol 为溶剂,
以afforded 3-hydroxy-1-(4-methoxy-phenyl)-6-(4-nitro-phenyl)-1,4,5,6-tetrahydro-pyrazolo[3,4-c]pyridin-7-one的产率得到3-hydroxy-1-(4-methoxyphenyl)-6-(4-nitrophenyl)-1,4,5,6-tetrahydro-7H-pyrazolo[3,4-c]pyridin-7-one