Synthesis of the ketimine of chitosan and 4,6-diacetylresorcinol, and study of the catalase-like activity of its copper chelate

► 4,6-Diacetylresorcinol derivative of chitosan was synthesized at heterogeneous medium. ► CSDAR-Cu has a higher thermal stability than CSDAR. ► Cu(II) complex displayed a good catalytic activity towards the decomposition of H2O2.