By employing reusable heterogeneous catalyst, modified magnetic reduced graphene oxide-supported palladium catalyst (MRGO@ DAP- AO-Pd^ll), the regioselective C-5 arylation of imidazoles via CH bond activation pathway for the preparation of C5-arylated imidazoles has been successfully achieved in alkaline deep eutectic solvent made of potassium carbonate and glycerol under aerobic conditions. Compared to previous procedures, significant improvements of this new protocol demonstrated by the high catalytic efficiency, easy recovery of catalyst, broad substrate scope and sustainable reaction condition using green solvent.

中文翻译：

---

碱性深共晶溶剂中改性磁性还原氧化石墨烯负载的钯负载的CH键活化的CH键活化的咪唑-芳基偶联反应

通过使用可重复使用的非均相催化剂，改性磁性还原氧化石墨烯负载的钯催化剂（MRGO @ DAP-AO-Pd ^ll），已通过C H键活化途径对咪唑进行了区域选择性C-5芳构化，以制备C5芳基化的咪唑在有氧条件下，成功地由碳酸钾和甘油制成的碱性深共晶溶剂。与以前的程序相比，此新方案的显着改进是催化效率高，催化剂易于回收，广泛的底物范围以及使用绿色溶剂可持续的反应条件。