2-[(3-hydroxy-4-methyl-1H-pyrazolo[3,4-b]pyridine-6-yl)-hydrazono]succinic acid dimethyl ester 在
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 4.0h,
以43.3%的产率得到5-hydroxy-1-(3-hydroxy-4-methyl-1H-pyrazolo[3,4-b]pyridine-6-yl)-1H-pyrazole-3-carboxylic acid methyl ester