Novel bisamide palladium(II) pincer complexes: effective catalysts in α-arylation of ketones
作者:Wang Kai、Dabin Liu、Hua Qian、Zhiwen Ye
DOI:10.1007/s11243-017-0148-6
日期:2017.8
Three benzenedicarboxamide ligands (L) were designed and synthesized, and each was used to prepare a palladium(II) complex Pd(L)Br and Pd(L)(OAc). These NCN pincer complexes were used to catalyze the α-arylations of a variety of ketones with aryl chlorides or bromides in various solvents, and moderate-to-excellent yields were obtained (up to 95%). Further research showed that unactivated and sterically
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。
N-heterocyclic carbene-palladium-imine complex catalyzed α-arylation of ketones with aryl and heteroaryl chlorides under air atmosphere
作者:Hui-Yang Lu、An Shen、Yong-Qing Li、Yu-Cai Hu、Chen Ni、Yu-Cai Cao
DOI:10.1016/j.tetlet.2020.152124
日期:2020.7
synthesized and unambiguously confirmed by X-ray single crystal diffraction. It was found to be an efficient and air-stable catalyst for the α-arylation of ketones. The reaction could be operated in air without any negative effect. Non-activated aryl and heteroaryl chlorides have been successfully applied in the reaction with only 0.5 mol% catalyst loadings under air atmosphere. Excellent to good product yields
Carbene adduct of cyclopalladatedferrocenylimine exhibited highly catalytic activity for the α-arylation of ketones with aryl halides. The corresponding products were obtained in moderate to excellent yields. Such protocol was applied to various ketones and a broad scope of aryl halides including aryl chlorides, bromides as well as unactivated and sterically hindered aryl halides.
Palladium-Catalyzed α-Arylation of Arylketones at Low Catalyst Loadings
作者:Enrico Marelli、Martin Corpet、Sian R. Davies、Steven P. Nolan
DOI:10.1002/chem.201404900
日期:2014.12.22
involves the use of a preformed, bench‐stable Pd–N‐heterocyclic carbene pre‐catalyst bearing IHept as an ancillary ligand, and allows the coupling of various functionalized coupling partners at very lowcatalystloading. Careful choice of the solvent/base system was crucial to obtain optimum catalyst performance. The pre‐catalyst was also successfully tested in the synthesis of an industrially relevant