1-(5-acetyl-6-methyl-4-(pyridin-3-yl)-1H-pyrazolo[3,4-b]pyridin-3-yl)-3-phenylthiourea 、
2-氯乙酰乙酸乙酯 在
sodium acetate 作用下,
以
乙醇 为溶剂,
反应 5.0h,
以69%的产率得到1-(3-[(5-acetyl-3-phenyl-4-hydroxy-1,3-thiazol-2(3H)-ylidene)amino]-6-methyl-4-(pyridin-3-yl)-1H-pyrazolo[3,4-b]pyridin-5-yl)ethanone