N-Heterocyclic carbene-palladacyclic complexes: synthesis, characterization and their applications in the C-N coupling and α-arylation of ketones using aryl chlorides
作者:Feng Liu、Yuan-Yuan Hu、Di Li、Quan Zhou、Jian-Mei Lu
DOI:10.1016/j.tet.2018.07.052
日期:2018.9
a one-pot procedure under mild conditions. The structure of 3a was unambiguously confirmed by X-ray single crystal diffraction and it was an active catalyst in the Buchwald-Hartwig amination and α-arylation of ketones even at very lowcatalystloadings (0.01 mol%).
(IPr)Pd(acac)Cl: An Easily Synthesized, Efficient, and Versatile Precatalyst for C−N and C−C Bond Formation
作者:Nicolas Marion、Elise C. Ecarnot、Oscar Navarro、Dino Amoroso、Andrew Bell、Steven P. Nolan
DOI:10.1021/jo060190h
日期:2006.5.1
and IPr·HCl [acac = acetylacetonate; IPr = N,N‘-bis(2,6-diisopropylphenyl)imidazol-2-ylidene], has been developed. The resulting complex, (IPr)Pd(acac)Cl (1), has proven to be a highly active PdII precatalyst in the Buchwald−Hartwig and the α-ketone arylation reactions. A wide range of substrates has been screened, including unactivated, sterically hindered, and heterocyclic aryl chlorides.
Well-Defined, Air-Stable (NHC)Pd(Allyl)Cl (NHC = N-Heterocyclic Carbene) Catalysts for the Arylation of Ketones
作者:Mihai S. Viciu、Romain F. Germaneau、Steven P. Nolan
DOI:10.1021/ol026745m
日期:2002.11.1
A number of palladium-N-heterocycliccarbene (NHC) complexes were found to be active catalysts for the arylation of ketones. A large number of substrates, both aryl halides and ketones, are compatible with the reaction conditions. The ketone arylation reactions are achieved with low catalyst loading in short reaction times using aryl chlorides and triflates as reactive partners. [reaction: see text]
with primary and secondary allylic alcohols. The reactions, carried out in aqueous ethanol in the presence of palladium(II) acetate as precatalyst and sodium hydrogen carbonate as base, gave the arylation products with good overall conversion. In all cases, the major products were the β-arylated carbonyl derivatives. The o-benzene-disulfonimide was recovered in high yield from all the reactions, and it
芳烃重氮邻苯二磺酰亚胺与伯和仲烯丙醇反应。在醋酸钯 (II) 作为预催化剂和碳酸氢钠作为碱的存在下,在含水乙醇中进行的反应得到了具有良好总转化率的芳基化产物。在所有情况下,主要产物都是 β-芳基化羰基衍生物。从所有反应中以高收率回收邻苯二磺酰亚胺,并将其循环用于制备其他盐。
General and Mild Ni<sup>0</sup>-Catalyzed α-Arylation of Ketones Using Aryl Chlorides
作者:José A. Fernández-Salas、Enrico Marelli、David B. Cordes、Alexandra M. Z. Slawin、Steven P. Nolan
DOI:10.1002/chem.201406457
日期:2015.3.2
A general methodology for the α‐arylation of ketones using a nickel catalyst has been developed. The new well‐defined [Ni(IPr*)(cin)Cl] (1 c) pre‐catalyst showed great efficiency for this transformation, allowing the coupling of a wide range of ketones, including acetophenone derivatives, with various functionalised arylchlorides. This cinnamyl‐based Ni–N‐heterocyclic carbene (NHC) complex has demonstrated
已经开发了使用镍催化剂对酮进行α-芳基化的一般方法。定义明确的新型[Ni(IPr *)(cin)Cl](1 c)预催化剂显示出极高的转化效率,使各种酮(包括苯乙酮衍生物)与各种官能化的芳基氯化物偶合。这种基于肉桂基的Ni-N-杂环卡宾(NHC)配合物表现出与以前报道的NHC-Ni催化剂不同的行为。初步的机理研究表明,Ni 0 / Ni II催化循环起作用。