1041085-99-7Relevant academic research and scientific papers
Heterobimetallic iridium-ruthenium assemblies through an ambidentate triazole-diylidene ligand: Electrochemical properties and catalytic behavior in a cascade reaction
Sabater, Sara,Mata, Jose A.,Peris, Eduardo
, p. 6450 - 6456 (2012)
The preparation in high yield of a (p-cymene)RuII(triazolium- ylidene) complex allows the synthesis of an heterobimetallic Ir III-RuII complex with a triazole-diylidene bridge. The same complex can also be prepared by starting from the previously reported complex Cp*IrIII(triazolium-ylidene). A full electrochemical study of the heterobimetallic complex has been performed, and the results have been compared with those for the related homobimetallic triazole-diylidene bridged complexes of ruthenium and iridium, where a weak metal-metal interaction (class II, according to the Robin and Day classification) has been detected. The Ir-Ru complex and some other related (p-cymene)Ru(NHC) complexes have been tested in a new tandem process, implying the chelation-assisted arylation of arylpyridines with 1-(4-halophenyl)ethanol. The arylation is accompanied by the transformation of the alcohol into a ketone, in the presence of acetone, through an Oppenauer oxidation process.
Solvent and Base in One: Tetra-n-butylammonium Acetate as a Multi-Purpose Ionic Liquid Medium for Ru-Catalyzed Directed Mono- and Di-o-C–H Arylation Reactions
Zou, Ya-Ling,Wang, Zhen-Yu,Feng, Yin-Mao,Li, You-Gui,Kantchev, Eric Assen B.
, p. 6274 - 6282 (2017)
Ru-catalyzed directed o-C–H arylation reactions of 2-phenylpyridine, N-phenylpyrazole, acetophenone N-(p-methoxyphenyl)imine, and 2-phenyloxazoline proceed in good to excellent yields with a number of functionalized aryl and heteroaryl bromides in neat Bu4NOAc at 120 °C. The acetate ion acts as the base and the relatively low melting point Bu4N salts (a mixture of acetate and bromide) behave as an ionic liquid. Arylation reactions of 2-phenyloxazoline proceed with concomitant oxazolidine cleavage to give 2-(N-acetylamino)ethyl benzoates promoted by side product CH3COOH. The dual-purpose ionic liquid medium is compatible with both ligandless Ru for di-arylation (optimal pre-catalyst: RuCl3·xH2O) and Ru-phosphane (optimal pre-catalyst: [RuCl2(p-cymene)]2/P(p-Tol)3 1:4) catalysts (1–5 mol-%) for selective mono-arylation.
Solvent-free ruthenium-catalysed triflate coupling as a convenient method for selective azole-o-C-H monoarylation
Abidi, Oumaima,Boubaker, Taoufik,Hierso, Jean-Cyrille,Roger, Julien
, p. 5916 - 5919 (2019/06/24)
Metal-catalysed ortho-directed C-H functionalization usually faces selectivity issues in the competition between mono- and disubstitution processes. We report herein the ruthenium-catalysed N-directed C-H monoarylation of arylpyrazoles with a selectivity
Ruthenium complexes of κ(P)-and κ(P)-η6- coordinated KITPHOS monophosphines: Efficient catalysts for the direct ortho arylation of 2-phenylpyridine and N-phenylpyrazole with aryl chlorides
Doherty, Simon,Knight, Julian G.,Addyman, Carrie R.,Smyth, Catherine H.,Ward, Nicholas A. B.,Harrington, Ross W.
experimental part, p. 6010 - 6016 (2012/01/14)
Thermolysis of the P-coordinated KITPHOS monophosphine complex [(p-cymene)RuCl2(KITPHOS)] in chlorobenzene at 120 °C resulted in displacement of the p-cymene to afford [{κ(P)-η 6-KITPHOS} RuCl2], the first example of a con
Recyclable solid ruthenium catalysts for the direct arylation of aromatic C-H bonds
Miura, Hiroki,Wada, Kenji,Hosokawa, Saburo,Inoue, Masashi
supporting information; experimental part, p. 4186 - 4189 (2010/06/20)
(Figure Presented) Environmentally benign catalyst: A PPh3-modified Ru/CeO2 catalyst showed excellent catalytic activity toward direct C-H arylation by using various aryl chlorides in the reaction (see scheme). The catalyst was found to act heterogeneously and could be recycled without significant loss of activity.
