NiFe2O4@SiO2-immobilized copper Schiff base complex as a versatile heterogeneous catalyst for efficient one-pot multicomponent synthesis of bioactive naphthopyran derivatives

A magnetically retrievable Cu( ii ) Schiff base complex immobilized on NiFe 2 O 4 @SiO 2 efficiently catalyzes a green, one-pot synthesis of bioactive naphthopyrans with broad substrate scope and excellent recyclability.