Abstract
A series of Pd complexes of picoline-functionalized N-heterocyclic carbenes with different substituents were synthesized. The molecular structures of selected complexes were determined by X-ray diffraction studies, showing a pseudo-square-planar structure with a Pd center surrounded by carbene, pyridine, and two chloride ligands. The influence of the different substituents on the structure and reactivity of the complexes has been studied. The catalytic properties of the complexes were investigated in the Mizoroki–Heck reaction for cross-coupling of bromobenzene with a variety of aryl halides. Their performances varied in these reactions but showed good product regioselectivities.
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Acknowledgments
We are grateful to the foundation of NSFC (21071121, 21172188 and 21104064), Graduate Foundation (CXLX11_0909 and CXLX11_0910), SRF for ROCS, SEM, PAPD, and the State Key Laboratory of Inorganic Synthesis and Preparative Chemistry at Jilin University (2013-03) for financial support.
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Cao, C., Sun, R., Chen, Q. et al. Palladium complexes with picolyl functionalized N-heterocyclic carbene ligands and their application in the Mizoroki–Heck reaction. Transition Met Chem 38, 351–358 (2013). https://doi.org/10.1007/s11243-013-9700-1
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DOI: https://doi.org/10.1007/s11243-013-9700-1