期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 766, 期 -, 页码 73-78出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2014.05.001
关键词
N-Heterocyclic carbene; Palladium complexes; Diphosphine ligands; Buchwald-Hartwig amination
资金
- National Natural Science Foundation of China [21372095, 21172092, 21301061]
- National Science Foundation of Anhui Educational Bureau [KJ2013B251]
- Anhui Provincial Natural Science Foundation [1408085QB36]
A series of dinuclear N-heterocyclic carbene (NHC) palladium complexes [PdCl2(NHC)](2)(mu-L) (1-6, L = diphosphine ligands) has been synthesized and fully characterized by H-1 NMR, C-13 NMR and P-31 NMR spectroscopies, elemental analysis, IR spectroscopy, and X-ray crystal structural study. The solid-state structures of 1-6 show dinuclear frameworks with two palladium(II) centres were held together by bridging diphosphine ligands. Each palladium centre was coordinated by an N-heterocyclic carbene ligand, a phosphorus atom and two chloro ions in a trans-arrangement. Further explorations of the catalytic potential of the dinuclear carbene palladium complexes as catalysts for Pd-mediated transformations have been examined under microwave irradiation conditions and the title complexes (1-6) displayed good catalytic activities in Buchwald-Hartwig aminations of aryl chlorides. (C) 2014 Elsevier B. V. All rights reserved.
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