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]
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。
Simple, Highly Active Palladium Catalysts for Ketone and Malonate Arylation: Dissecting the Importance of Chelation and Steric Hindrance
作者:Motoi Kawatsura、John F. Hartwig
DOI:10.1021/ja983378u
日期:1999.2.1
catalytic reaction rates. We initially tested the bisphosphine ligand DtBPF (1,1‘-bis-(di-tert-butylphosphino)ferrocene) for this palladium-catalyzed chemistry. This catalyst system led to fast reaction rates for reactions of aryl bromides with ketones, including roomtemperature chemistry in many cases. In some cases turnover numbers were 20 000. The catalyst also gave mild reactions with aryl chlorides
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
Nickel-Catalyzed Transformation of Aryl 2-Pyridyl Ethers via Cleavage of the Carbon–Oxygen Bond: Synthesis of Mono-α-arylated Ketones
作者:Zhong-Xia Wang、Jing Li
DOI:10.1055/s-0037-1609963
日期:2018.8
aryl 2-pyridyl ethers with propiophenone and acetophenone derivatives via C–OPy bond cleavage is performed in the presence of t-BuOLi to give mono-α-arylated ketones in moderate yields. The method is suitable for electron-rich and electron-poor ethers as well as heteroaryl ethers and tolerates a range of active functional groups. The nickel/IPr-catalyzed reaction of aryl 2-pyridyl ethers with propiophenone