Attapulgite-anchored Pd complex catalyst: a highly active and reusable catalyst for C–C coupling reactions

Abstract

Natural clay, attapulgite was successfully employed to prepare reusable heterogeneous catalyst of ATP–APTES–Pd through simple and green steps. The catalyst was characterized by ICP, IR, XRD, XPS, SEM, and TG. The novel complex exhibited excellent activity for a wide scope of Suzuki and Heck cross-coupling reactions without phosphine ligand, respectively. Remarkably, the catalyst is easy to separate, stable and can be reused several times in good activity without any additional activation treatment.