C−H Bond Activation/Arylation Catalyzed by Arene-Ruthenium-Aniline Complexes in Water
作者:Chinky Binnani、Deepika Tyagi、Rohit K. Rai、Shaikh M. Mobin、Sanjay K. Singh
DOI:10.1002/asia.201600954
日期:2016.11.7
Water‐soluble arene–ruthenium complexes coordinated with readily available aniline‐based ligands were successfully employed as highly active catalysts in the C−H bond activation and arylation of 2‐phenylpyridine with aryl halides in water. A variety of (hetero)aryl halides were also used for the ortho‐C−H bond arylation of 2‐phenylpyridine to afford the corresponding ortho‐ monoarylated products as
One-pot direct C–H arylation of arenes in water catalysed by RuCl3·nH2O–NaOAc in the presence of Zn
作者:Luis A. Adrio、José Gimeno、Cristian Vicent
DOI:10.1039/c3cc43452d
日期:——
The inexpensive and commercially available catalytic system RuCl3·nH2OâNaOAcâZn is active in water for the direct CâH arylation of arenes with aryl/heteroaryl chlorides. The reaction can be accelerated by the use of microwave irradiation and can also be scaled up to a multi-gram scale with excellent isolated yields.
straightforward and efficient method for the rhodium-catalyzed intermolecular oxidativecross-coupling of arenes and heteroarenes with thio- and selenophene derivatives (chalcogenophenes) via double C–H bond cleavage has been developed by using Cu(OAc)2/AgSbF6 as an oxidant. The reaction is applicable to a wide range of (hetero)arenes carrying a directing group and chalcogenophenes to yield substituted biaryl
Ruthenium(<scp>ii</scp>)-catalyzed selective monoarylation in water and sequential functionalisations of C–H bonds
作者:Percia B. Arockiam、Cédric Fischmeister、Christian Bruneau、Pierre H. Dixneuf
DOI:10.1039/c2gc36222h
日期:——
The ruthenium(II)-phosphine catalyst RuCl2(PPh3)(p-cymene) operating water selectively leads to ortho monoarylation, with arylchlorides and heteroarylhalides, of functional arenes. Further catalytic heteroarylation with Ru(OAc)2(p-cymene) in water produces mixed bifunctional derivatives.
Ruthenium‐Catalyzed C‐H Bond Activation/Arylation Accelerated by Biomass‐Derived Ligands
作者:Chinky Binnani、Shyama Charan Mandal、Biswarup Pathak、Sanjay K. Singh
DOI:10.1002/ejic.201900218
日期:2019.6.23
A variety of ligands are being explored extensively to achieve enhanced performance for ligand assisted C‐Hbond activation/functionalization reactions. We explored here several readily available biomass‐derived ligands as effective additives to significantly enhance the catalytic activity of arene‐Ru(II) dimer for ortho C‐Hbond arylation in a water‐based catalytic reaction. We achieved almost 7‐fold
人们正在广泛探索各种配体,以提高配体辅助的C–H键活化/官能化反应的性能。我们在这里探索了几种容易获得的生物质衍生的配体作为有效的添加剂,以显着增强芳烃-Ru(II)二聚体在水基催化反应中邻位C-H键芳基化的催化活性。我们在催化活性达到几乎7倍的增强与[(η 6 - p -cymene)的RuCl 2 ] 2乙酰丙酸配体存在下于80°C的催化剂。大规模研究表明原位形成了钌-乙酰丙酸酯复合物,它可能通过促进2-苯基吡啶邻位C-H键的初始活化在重要的环化钌中间体的形成中起关键作用。密度泛函理论研究还推断,配体辅助途径在能量上更有利,因为乙酰基参与了去质子化步骤。