Preparation and characterization of ZrO2-supported Fe3O4-MNPs as an effective and reusable superparamagnetic catalyst for the Friedländer synthesis of quinoline derivatives

Abstract

In this study, a convenient, appropriate and eco-friendly method for the synthesis of quinoline derivatives via a Friedländer reaction was developed using ZrO2/Fe3O4-MNPs as an effective and reusable heterogeneous catalyst. The morphology of ZrO2/Fe3O4-MNPs was studied by the XRD, FT-IR, SEM, TEM and VSM techniques. Green reactions, straight and easy work-up, high yields of the products and good reaction times are the benefits of this procedure. Further, the catalyst could be recovered using an external magnetic field and reused at least three times without a considerable decrease in its catalytic activity.