Highly effective silica gel-supported N-heterocyclic carbene-Pd catalyst for Suzuki-Miyaura coupling reaction

The immobilized N-heterocyclic carbene-Pd complex was readily prepared by reaction of silica gel-supported imidazolium chloride with Pd(OAc)(2). The Pd complex exhibited excellent catalytic activity in the coupling reaction of aryl halides with arylboronic acid. The heterogeneous Pd catalyst was reusable as well as air-stable to allow easy use.