▎ 摘　　要

By employing reusable heterogeneous catalyst, modified magnetic reduced graphene oxide-supported palladium catalyst (MRGO@ DAP- AO-Pd-II), the regioselective C-5 arylation of imidazoles via C-H 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.