A novel and efficient protocol has been developed for the synthesis of azaarene-substituted 3-hydroxy-2-oxindoles via sp3 CâH functionalization of 2-methyl azaarenes and (2-azaaryl)methanes with isatin in good to excellent yield. This is the first example in which heterogeneous, reusable silica supported dodecatungstophosphoric acid (DTP/SiO2) catalyzed sp3 CâH functionalization of 2-substituted azaarenes and (2-azaaryl)methanes.
开发了一种新颖且高效的方法,通过
2-甲基吖嗪和(2-吖基
苯基)
甲烷在异
钨酸
硅(DTP/SiO2)催化下进行的sp3 C―H官能团化反应,合成取代的3-羟基-2-
氧吲哚。此方法在良好至优异的产率下进行。这是首个实例,展示了可
重复使用的非均相
硅载体十二
钨磷酸(DTP/SiO2)催化2-取代吖嗪和(2-吖基
苯基)
甲烷的sp3 C―H官能团化反应。