Mixed N-heterocycles/N-heterocyclic carbene palladium(II) allyl complexes as precatalysts for direct arylation of azoles with aryl bromides
作者:Jin Yang
DOI:10.1016/j.tet.2019.02.031
日期:2019.4
A series of mixed N-heterocycles/N-heterocyclic carbene palladium(II) allylcomplexes with general formula [(NHC)Pd(η3-allyl)]2(μ2-N-heterocycles)(BF4)2 were prepared in one pot based on anion metathesis of (NHC)Pd(η3-allyl)Cl complexes and then ligand replacement with N-heterocycles [N-heterocycles = pyrazine (pyz), 4,4′-bipyridine (bpy) and trans-4,4′-bipyridylethylene (bpe)]. The solid-state structures
Development of a practical Buchwald–Hartwig amine arylation protocol using a conveniently prepared (NHC)Pd(R-allyl)Cl catalyst
作者:Mark J. Cawley、F. Geoffrey N. Cloke、Richard J. Fitzmaurice、Stuart E. Pearson、James S. Scott、Stephen Caddick
DOI:10.1039/b801479e
日期:——
Continuing efforts to establish a more general âuser-friendlyâ protocol for the palladium-catalysed arylation of amines (BuchwaldâHartwig reaction) are described herein. Significant advances have been made through the use of the versatile (SIPr)Pd(methallyl)Cl complex in conjunction with the reliable base lithium hexamethyldisilazide (LHMDS).
Palladium(0) NHC complexes: a new avenue to highly efficient phosphorescence
作者:Adam F. Henwood、Mathieu Lesieur、Ashu K. Bansal、Vincent Lemaur、David Beljonne、David G. Thompson、Duncan Graham、Alexandra M. Z. Slawin、Ifor D. W. Samuel、Catherine S. J. Cazin、Eli Zysman-Colman
DOI:10.1039/c4sc03914a
日期:——
We report the first examples of highly luminescent di-coordinated Pd(0) complexes.
我们报道了高度发光的双配位Pd(0)配合物的首个实例。
Activation and Reactivity of (NHC)Pd(allyl)Cl (NHC = N-Heterocyclic Carbene) Complexes in Cross-Coupling Reactions
作者:Mihai S. Viciu、Romain F. Germaneau、Oscar Navarro-Fernandez、Edwin D. Stevens、Steven P. Nolan
DOI:10.1021/om020804i
日期:2002.12.1
Mononuclear palladium-allyl complexes bearing one N-heterocycliccarbene (NHC) ligand have been synthesized. These complexes offer a straightforward entryway into a number of catalytic cycles by simple action of a base.
(N-heterocyclic carbene) = SIPr [N,N′-bis(2,6-diisopropylphenyl)imidazolidin-2-ylidene] or IPr [N,N′-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene], afforded Pd–Os mixed metalclusters with formulas of [PdnOs3(CO)12(NHC)n] (n = 1–3). These are the first examples of Pd–Os heterometallic clusterscontaining NHC ligands, and they have all been structurally characterized. In all these clusters, the metal cores