NiFe2O4 Nanoparticles: A Green and Reusable Heterogeneous Catalyst for the Synthesis of Spiro[indole-3,2′-Pyrrole]-2,5′(1H,1′H)-Diones

Abstract

NiFe2O4 nanoparticles were used as an efficient catalyst for the preparation of spiro[indole-3,2′-pyrrole]-2,5′(1 H,1′ H)-diones by the multi-component condensation reaction of arylamines, acetylenedicarboxylates and isatins under reflux conditions in ethanol.