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Piperazine‐ and DABCO‐bridged dinuclear N ‐heterocyclic carbene palladium complexes: synthesis, structure and application to Hiyama coupling reaction
Author(s) -
Wang Haozhen,
Yang Jin
Publication year - 2017
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.3543
Subject(s) - chemistry , palladium , piperazine , dabco , carbene , coupling reaction , catalysis , aryl , medicinal chemistry , crystal structure , polymer chemistry , stereochemistry , organic chemistry , alkyl
Four dinuclear N ‐heterocyclic carbene (NHC) palladium complexes were prepared by reaction of imidazolinium salts, PdCl 2 and bridging ligands (piperazine and DABCO) in one pot or by direct cleavage of the chloro‐bridged dimeric compounds [Pd( μ ‐Cl)(Cl)(NHC)] 2 with bridging ligands. All of the complexes were fully characterized using 1 H NMR, 13 C NMR, high‐resolution mass and infrared spectroscopies, elemental analysis and single‐crystal X‐ray diffraction. The catalytic activities of the obtained palladium catalysts towards Hiyama coupling of aryl chlorides with phenyltrimethoxysilane were investigated and the results showed that the dinuclear palladium complexes were considerably active for the coupling reaction . Copyright © 2016 John Wiley & Sons, Ltd.