Cu/cellulose-modified magnetite nanocomposites as a highly active and selective catalyst for ultrasound-promoted aqueous O-arylation Ullmann and sp-sp2 Sonogashira cross-coupling reactions

Abstract

In this study, the synthesis of novel magnetically recoverable heterogeneous nanocomposites is synthesized by a step-wise immobilization of Cu nanoparticles on cellulose-modified magnetic nanoparticles. The characterization of the structure and composition of the designed catalyst were realized by FT-IR, EDX, XRD, FESEM, TEM, VSM, BET-BJH, DLS, XPS. The catalytic performance of the catalyst was evaluated for synthesis Ullmann and Sonogashira cross coupling reactions in water mixture as green and environmentally benign reaction media. This new catalytic entity could open a new route for the synthesis of cross-coupling reactions under green solvent conditions. Furthermore, the catalyst can be certainly separated from the reaction combination through the usage of a magnet and recycled up to six times without any loss in its activity.