A highly efficient and recyclable cobalt ferrite chitosan sulfonic acid magnetic nanoparticle for one-pot, four-component synthesis of 2H-indazolo[2,1-b]phthalazine-triones

Abstract

A novel magnetical cobalt ferrite chitosan sulfonic acid (CoFe₂O₄-CS-SO₃H) was prepared and identified as an efficient catalyst for synthesis of 2<italic>H</italic>-indazolo[2,1-<italic>b</italic>]phthalazine-triones by one-pot, four-component reaction.