Cross-Coupling Knows No Limits: Assessing the Synthetic Potential of the Palladium-Catalysed Cross-Coupling of Organolithiums
作者:James D. Firth、Peter O'Brien
DOI:10.1002/cctc.201402886
日期:2015.2
Organolithiums have passed the test! Previously considered too reactive and unstable, organolithiums have been tamed and can now participate successfully in palladium‐catalysed cross‐coupling with aryl/vinyl bromides and triflates.
Pushing the limits of steric demand around a biaryl axis: synthesis of tetra-ortho-substituted biaryl naphthalenes
作者:Adam C. Glass、Sam Klonoski、Lev N. Zakharov、Shih-Yuan Liu
DOI:10.1039/c0cc02170a
日期:——
The synthesis of tetra-ortho-substituted biaryl naphthalenes, including examples bearing multiple ortho-isopropyl groups, has been developed via a catalytic rearrangement process.
Synthesis of unsymmetrical biaryls via kinetic higher order cyanocuprates: scope, limitations, and spectroscopic insights
作者:Bruce H. Lipshutz、Konstantin Siegmann、Emiliano Garcia、Frank Kayser
DOI:10.1021/ja00073a051
日期:1993.10
Treatment of lower order arylcyanocuprates ArCu(CN)Li with 1 equiv of an aryllithium (Ar'Li) at temperatures around -125 o C leads to higherorder reagents Ar(Ar')Cu(CN)Li 2 . Upon exposure of such reagents at this temperature to ground-state molecular oxygen, good yields of the unsymmetrical biaryl Ar-Ar' can be realized. Several different types of aryl ligands have been examined, including naphthalenes
在 -125 o C 左右的温度下,用 1 当量的芳基锂 (Ar'Li) 处理低级芳基氰铜酸盐 ArCu(CN)Li 会产生高级试剂 Ar(Ar')Cu(CN)Li 2 。在该温度下将此类试剂暴露于基态分子氧后,可以实现不对称联芳基 Ar-Ar' 的良好产率。已经检查了几种不同类型的芳基配体,包括萘,以评估该方法的通用性。已经在 -130 o C 和更高温度下获得了三种不同铜酸盐的光谱数据( 13 C NMR),以确定它们的动力学性质(如合成化学所示)是否可以通过物理方法证实
Preparation and catalytic applications of partially fluorinated binaphthol ligands
作者:Shahla Yekta、Larissa B Krasnova、Brian Mariampillai、Christine J Picard、Gang Chen、Subramanian Pandiaraju、Andrei K Yudin
DOI:10.1016/j.jfluchem.2003.11.024
日期:2004.4
New partially fluorinated binaphthols were obtained using a copper-catalyzed oxidativecoupling. The corresponding enantiomerically pure compounds were prepared by fractional crystallization of the corresponding bis(menthyl)carbamates. Nucleophilic aromatic substitution using oxygen- and carbon-based nucleophiles resulted in functionalized derivatives without concomitant racemization. The titanium(IV)
The Anionic Pathway in the Nickel‐Catalysed Cross‐Coupling of Aryl Ethers
作者:Andryj M. Borys、Eva Hevia
DOI:10.1002/anie.202110785
日期:2021.11.8
uncovered. Combined stoichiometric, catalytic, and kinetic studies reveal that these hetero-bimetallic complexes may be the key intermediates that facilitate the smooth C−O bond cleavage and cross-coupling of arylethers under mild conditions.