▎ 摘　　要

Magnetic graphene oxide functionalized with sulfonic acid (Fe3O4-GO-SO3H) was used as a new recyclable nanocatalyst for one-pot synthesis of N-aryl-2-amino-1,6-naphthyridine derivatives under solvent free conditions. The catalyst could be easily recovered from the reaction mixture by an external magnet and reused without significant decrease in activity even after 4 runs. This nanocatalyst exhibited better activities to other commercially available sulfonic acid catalysts.