953420-69-4Relevant academic research and scientific papers
Palladium immobilized on functionalized hypercrosslinked polymers: A highly active and recyclable catalyst for Suzuki-Miyaura coupling reactions in water
Liu, Xi,Xu, Wei,Xiang, Dexuan,Zhang, Zaixing,Chen, Dizhao,Hu, Yangjian,Li, Yuanxiang,Ouyang, Yuejun,Lin, Hongwei
, p. 12206 - 12210 (2019)
Heterogeneous catalysts have shown advantages such as high stability, good recyclability and easy separation from reactants over homogeneous catalysts in recent years. In this paper, three pyridine-functionalized N-heterocyclic carbene-palladium complexes (HCP-Pd) were successfully synthesized via a simple external cross-linking reaction. In each catalyst (i.e., complex), palladium (Pd) was immobilized on the hypercrosslinked polymer (HCP) via formation of a six-membered ring by Pd2+ and the bidentate ligands of NHC and pyridine. The structure and composition of HCP-Pd were characterized by SEM, TEM, N2 sorption, FT-IR, TGA and XPS. The catalytic performances of these catalysts in a Suzuki-Miyaura coupling reaction were also studied. The results prove that HCP-Pd is a very effective heterogeneous catalyst for the Suzuki-Miyaura coupling reaction of various aryl halides with aryl boronic acid in an aqueous medium under mild conditions.
