2-methyl-3-[4-phenyl-5-(4H-1,2,4-triazol-3-yl)-1,3-thiazol-2-yl]pyrazolo[1,5-a]pyridine p-toluenesulfonate 、
氯代丙二酸二乙酯 以
异丙醇 为溶剂,
反应 4.0h,
以to give ethyl 4-hydroxy-2-(2-methylpyrazolo[1,5-a]pyridin-3-yl)-1,3-thiazole-5-carboxylate (1.45 g, 64%) as a yellow solid的产率得到ethyl 4-hydroxy-2-(2-methylpyrazolo[1,5-a]pyridin-3-yl)-1,3-thiazole-5-carboxylate