Cu2O/Graphene as an Efficient and Ligand Free Heterogeneous Catalyst for Ullmann Coupling of N–H Containing Compounds with Aryl Halides
Sign Up to like & getrecommendations! Published in 2018 at "Catalysis Surveys from Asia"
DOI: 10.1007/s10563-018-9245-6
Abstract: The graphene supported Cu2O nanoparticles were prepared via a two-step liquid-phase method and exhibited high catalytic activity and stability for the Ullmann coupling of aryl halides with N–H containing compounds under mild and ligand-free conditions.… read more here.
Keywords: ligand free; containing compounds; cu2o graphene; aryl halides ... See more keywords
An efficient synthesis of biaryl diamides via Ullmann coupling reaction catalyzed by CuI in the presence of Cs2CO3 and TBAB
Sign Up to like & getrecommendations! Published in 2018 at "Research on Chemical Intermediates"
DOI: 10.1007/s11164-018-3422-0
Abstract: CuI accompanyied by Cs2CO3 and TBAB was confirmed to be an efficient catalyst combination to promote an Ullmann coupling reaction. It facilitated 2-bromobenzamides to undergo a coupling reaction for the synthesis of symmetrical biaryldiamides in… read more here.
Keywords: coupling reaction; reaction; ullmann coupling; synthesis ... See more keywords
Silver(I) and copper(II)-imidazolium carboxylates: Efficient catalysts in Ullmann coupling reactions
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Chemical Sciences"
DOI: 10.1007/s12039-017-1262-x
Abstract: AbstractThe silver(I) and copper(II)-imidazolium carboxylate coordination assemblies were derived from the reaction between corresponding carboxylic acid ligands and metal salts. These new metal derivatives depict a novel structural motif with variable chemical and thermal properties.… read more here.
Keywords: copper imidazolium; silver copper; catalysts ullmann; ullmann coupling ... See more keywords
Catalytic specificity of linear polystyrene-stabilized Pd nanoparticles during Ullmann coupling reaction in water and the associated mechanism
Sign Up to like & getrecommendations! Published in 2018 at "Journal of Organometallic Chemistry"
DOI: 10.1016/j.jorganchem.2017.11.016
Abstract: Abstract In the present work, heterogeneous Pd nanoparticle catalysts supported on linear polystyrene (PS-PdNPs) were used to promote Ullmann coupling reactions in water. The coupling reaction of 4-bromotoluene proceeded readily in the presence of methanol… read more here.
Keywords: ullmann coupling; linear polystyrene; water; coupling reaction ... See more keywords
Synergistic effect of copper nanocrystals-nanoparticles incorporated in a porous organic polymer for the Ullmann C-O coupling r eaction
Sign Up to like & getrecommendations! Published in 2021 at "Molecular Catalysis"
DOI: 10.1016/j.mcat.2021.111460
Abstract: Abstract A quinoxaline-based porous organic polymer (Q-POP) as a mesoporous organic copolymer was developed as a new platform for the immobilization of CuNPs and copper nanocrystals. The prepared materials were characterized by FT-IR, XRD, N2… read more here.
Keywords: copper nanocrystals; organic polymer; copper; ullmann coupling ... See more keywords
Sustainable strategies of C–N bond formation via Ullmann coupling employing earth abundant copper catalyst
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DOI: 10.1016/j.tet.2021.132406
Abstract: Abstract N-arylation reaction has become one of the key strategies in organic synthesis to access several molecules of biological, agrochemical, and medicinal importance. The century-old Ullmann reaction, for the synthesis of C–N has been realized… read more here.
Keywords: sustainable strategies; copper; reaction; ullmann coupling ... See more keywords
Roles of Precursor Conformation and Adatoms in Ullmann Coupling: An Inverted Porphyrin on Cu(111)
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DOI: 10.1021/acs.chemmater.9b00668
Abstract: Surface diffusion, molecular conformation, and on-surface coupling reactions are key processes for building tailored molecular nanostructures such as graphene nanoribbons, polycyclic aromatic hydrocarbons, and one-dimensional/two-dimensional (2D) polymers. Here, we study the surface diffusion and coupling… read more here.
Keywords: roles precursor; conformation; precursor conformation; ullmann coupling ... See more keywords
An unexpected organometallic intermediate in surface-confined Ullmann coupling.
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DOI: 10.1039/c9nr00672a
Abstract: Ullmann coupling or, more generally, dehalogenative aryl-aryl coupling, is one of the most widely exploited chemical reactions to obtain one- and two-dimensional polymers on metal surfaces. It is generally described as a two-step reaction: (i)… read more here.
Keywords: ullmann coupling; surface; intermediate phase; spectroscopy ... See more keywords
Copper-Catalyzed Synthesis of Dibenzo[b,f]imidazo[1,2-d][1,4]oxazepine Derivatives via a Double Ullmann Coupling Reaction
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DOI: 10.1055/s-0037-1611945
Abstract: A double Ullmann coupling reaction successfully takes place between 4,5-diaryl-2-(2-bromophenyl)-1H-imidazoles and 2-bromophenols in the presence of Cs2CO3. This procedure is catalyzed by copper(I) iodide and o-phenanthroline and provides an efficient method for the synthesis of… read more here.
Keywords: coupling reaction; double ullmann; synthesis dibenzo; ullmann coupling ... See more keywords