ethyl 6-amino-3-methyl-4-(4-(dimethylamino)phenyl)-4,7-dihydro-1H-pyrazolo[3,4-b]pyridine-5-carboxylate 、
2,5-dinitrophenylhydrazine 以
乙醇 为溶剂,
以50%的产率得到6-amino-4,7-dihydro-3-methyl-4-(4-(dimethylamino)phenyl)-N´-(2,5-dinitrophenyl)-1H-pyrazolo[3,4-b]pyridine-5-carbohydrazide