▎ 摘　　要

A versatile Pd/Fe3O4 supported on N-doped reduced graphene oxide (N-rGO) catalyst was developed to carry out the synthesis of quinazolinones and phenanthridines under extremely mild conditions through isocyanide insertion cascades. The supported Pd/Fe3O4 nanoparticles could be easily recovered from the reaction mixture and reused several times without any loss in catalytic activity.