(α-Fe2O3)-MCM-41-SO3H as a novel magnetic nanocatalyst for the synthesis of N-aryl-2-amino-1,6-naphthyridine derivatives

Abstract

Abstract The new (α-Fe 2 O 3 )-MCM-41-SO 3 H catalyst was prepared directly through the reaction of chlorosulfonic acid with silica-coated nanoparticles (α-Fe 2 O 3 )-MCM-41 and used as a magnetically recyclable catalyst for an efficient one-pot synthesis of N-aryl-2-amino-1,6-naphthyridine derivatives. The catalyst with 10 wt% of loaded iron oxide nanoparticles could be recovered from the reaction mixture by an external magnet and reused without significant decrease in activity even after 5 runs. This new prepared catalyst exhibited better activities to other commercially available sulfonic acid catalysts.