142207-36-1Relevant articles and documents
Application of iridium pincer complexes in hydrogen isotope exchange reactions
Tr?ff, Annika,Nilsson, G?ran N.,Szabó, Kálmán J.,Eriksson, Ludvig
, p. 5529 - 5531 (2007)
Iridium pincer complex catalyzed hydrogen to deuterium exchange could be achieved using aromatic and heteroaromatic substrates. The reactions proceed under mild conditions and with high regioselectivity. The efficiency of the hydrogen isotope exchange rea
Deaminativemeta-C-H alkylation by ruthenium(ii) catalysis
Ackermann, Lutz,Wei, Wen,Yu, Hao,Zangarelli, Agnese
, p. 8073 - 8078 (2021)
Precise structural modifications of amino acids are of importance to tune biological properties or modify therapeutical capabilities relevant to drug discovery. Herein, we report a ruthenium-catalyzedmeta-C-H deaminative alkylation with easily accessible amino acid-derived Katritzky pyridinium salts. Likewise, remote C-H benzylations were accomplished with high levels of chemoselectivity and remarkable functional group tolerance. Themeta-C-H activation approach combined with our deaminative strategy represents a rare example of selectively converting C(sp3)-N bonds into C(sp3)-C(sp2) bonds.
Traceless-Activation Strategy for Rh-Catalyzed Csp2-H Arylation of Coumarins
Han, Fuzhong,Xun, Shanshan,Jia, Lina,Zhang, Yutong,Zou, Liwei,Hu, Xiangping
, p. 5907 - 5911 (2019)
A traceless-activation strategy for the synthesis of 4-arylchroman-2-ones via a Rh(III)-catalyzed C-H activation of 2-arylpyridines and subsequent conjugated/decarboxylative addition to coumarin-3-carboxylic acids has been reported. The carboxyl group at
Regioselective ruthenium catalysed H-D exchange using D2O as the deuterium source
Piola, Lorenzo,Ferandez-Salas, Jos A.,Manzini, Simone,Nolan, Steven P.
, p. 8683 - 8688 (2014)
An efficient and convenient ruthenium catalysed method for a regiospecific H/D exchange using D2O is described. Organic moieties such as pyridine, oxazole, imidazole, pyrazole, ester, ketone and carboxylic acid have been found effective directing groups in this transformation. In addition, the deuteration of the enantiopure (S)-Ketoprofen leads to the incorporation of three deuterium atoms with retention of molecular chirality.
Iridium(I) Complexes with Anionic N-Heterocyclic Carbene Ligands as Catalysts for H/D Exchange in Nonpolar Media
Koneczny, Marvin,Phong Ho, Luong,Nasr, Alexandre,Freytag, Matthias,Jones, Peter G.,Tamm, Matthias
, p. 3857 - 3863 (2020)
A series of neutral iridium(I) complexes of the general type [(WCA?NHC)]IrL(COD)] (COD=1,5-cyclooctadiene; L=phosphine, pyridine), bearing anionic N-heterocyclic carbenes (WCA?NHC) with a weakly coordinating anionic (WCA) borate moiety, were prepared by a
Parallel chemistry investigations of ortho-directed hydrogen isotope exchange between substituted aromatics and isotopic water: Novel catalysis by cyclooctadienyliridium(I)pentan-1,3-dionates
Kingston, Lee P.,Lockley, William J.S.,Mather, Andrew N.,Spink, Edward,Thompson, Stewart P.,Wilkinson, David J.
, p. 2705 - 2708 (2000)
Novel iridium-based catalysts which promote ortho-directed hydrogen isotope exchange between substituted aromatics and isotopic water have been identified via a combination of screening and subsequent ligand optimisation. The catalysts are more active, op
Capturing Elusive Cobaltacycle Intermediates: A Real-Time Snapshot of the Cp*CoIII-Catalyzed Oxidative Alkyne Annulation
Sanjosé-Orduna, Jesús,Gallego, Daniel,Garcia-Roca, Alèria,Martin, Eddy,Benet-Buchholz, Jordi,Pérez-Temprano, Mónica H.
, p. 12137 - 12141 (2017)
Despite Cp*CoIII catalysts having emerged as a very attractive alternative to noble transition metals for the construction of heterocyclic scaffolds through C?H activation, the structure of the reactive species remains uncertain. Herein, we rep
Mild, Selective Ru-Catalyzed Deuteration Using D2O as a Deuterium Source
Eisele, Pascal,Ullwer, Franziska,Scholz, Sven,Plietker, Bernd
supporting information, p. 16550 - 16554 (2019/12/11)
A method for the selective deuteration of polyfunctional organic molecules using catalytic amounts of [RuCl2(PPh3)3] and D2O as a deuterium source is presented. Through variation of additives like CuI, KOH, and various amounts of zinc powder, orthogonal chemoselectivities in the deuteration process are observed. Mechanistic investigation indicates the presence of different, defined Ru-complexes under the given specific conditions.