In the last years SILLP (supported ionic liquid-like phase)-based materials prepared by covalent attachment have been synthesized . Recently, we have synthesized a palladium-based catalytic system using halloysite nanotubes modified with octylimidazolium moieties and we have tested it in the Suzuki cross-coupling reaction under traditional heating, microwave irradiation and a very small amount of Pd catalyst [2,3].It is known that support based on triazole motif showed superior activity to the analogous imidazole molecules  so, we have focused our attention to develop a new SILLP system with triazolium moiety. Herein we report the synthesis of an original Pd-dicationic triazolium support based on halloysite nanotubes (HNT-triazo/Pd).The new HNT/Pd catalyst was used as catalyst in the Suzuki reaction under microwave irradiation. The best experimental conditions were obtained when the reactions were carried out for 10 minutes in water at 120 °C in presence of K2CO3 as base using 0.1 mol% of catalyst. Good recyclability was observed too.
|Numero di pagine||1|
|Stato di pubblicazione||Published - 2014|