Solvent and Base in One: Tetra-<i>n</i>
-butylammonium Acetate as a Multi-Purpose Ionic Liquid Medium for Ru-Catalyzed Directed Mono- and Di-<i>o</i>
-C-H Arylation Reactions
作者:Ya-Ling Zou、Zhen-Yu Wang、Yin-Mao Feng、You-Gui Li、Eric Assen B. Kantchev
DOI:10.1002/ejoc.201701022
日期:2017.11.16
Bu4NOAc can be a multi-purpose medium for a Ru-catalyzed directed o-C–H arylation reaction with functionalized aryl bromides. Acetate plays the role of base and Bu4N salts (excess acetate and side product bromide) behave as ionicliquids. The medium is compatible with both RuCl3·xH2O (major product: di-arylation) and [RuCl2(p-cymene)]2/(p-Tol)3P catalytic systems (major product: mono-arylation).
Bu 4 NOAc可以是多官能团介质,用于Ru催化的与官能化芳基溴化物进行的定向o -C–H芳基化反应。乙酸盐起碱的作用,Bu 4 N盐(过量的乙酸盐和副产物溴化物)起离子液体的作用。该介质与RuCl 3 · x H 2 O(主要产物:二芳基化)和[RuCl 2(p- cymene)] 2 /(p -Tol)3 P催化系统兼容(主要产物:单芳基化) 。
<i>Ortho</i> C–H arylation of arenes at room temperature using visible light ruthenium C–H activation
作者:Arunachalam Sagadevan、Anastasios Charitou、Fen Wang、Maria Ivanova、Martin Vuagnat、Michael F. Greaney
DOI:10.1039/d0sc01289k
日期:——
A ruthenium-catalyzedortho C–H arylation process is described using visible light. Using the readily available catalyst [RuCl2(p-cymene)]2, visible light irradiation was found to enable arylation of 2-aryl-pyridines at room temperature for a range of aryl bromides and iodides.
PhI(OCOCF<sub>3</sub>)<sub>2</sub>-mediated ruthenium catalyzed highly site-selective direct ortho-C–H monoarylation of 2-phenylpyridine and 1-phenyl-1H-pyrazole and their derivatives by arylboronic acids
Direct ortho C–H monoarylation of 2-phenylpyridine and 1-phenyl-1H-pyrazole and its derivatives via a Ru catalysed reaction using catalytic amount of Phl(OCOCF3)2 as a hyper-valent iodine oxidant with arylboronic acids is presented.
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 Complexes of κ(P)- and κ(P)-η<sup>6</sup>-Coordinated KITPHOS Monophosphines: Efficient Catalysts for the Direct Ortho Arylation of 2-Phenylpyridine and <i>N</i>-Phenylpyrazole with Aryl Chlorides
作者:Simon Doherty、Julian G. Knight、Carrie R. Addyman、Catherine H. Smyth、Nicholas A. B. Ward、Ross W. Harrington
DOI:10.1021/om200843f
日期:2011.11.14
P-coordinated KITPHOSmonophosphinecomplex [(p-cymene)RuCl2(KITPHOS)] in chlorobenzene at 120 °C resulted in displacement of the p-cymene to afford [κ(P)-η6-KITPHOS}RuCl2], the first example of a constrained-geometry complex in which the κ(P)-bonded diphenylphosphino group and the η6-coordinated proximal phenyl ring are connected by an unsaturated two-carbon tether; both complexes form efficient catalysts