Results 241 to 250 of about 330,962 (287)
Reversible Dehalogenation in On‐Surface Aryl–Aryl Coupling [PDF]
Angewandte Chemie - International Edition, 2020 AbstractIn the emerging field of on‐surface synthesis, dehalogenative aryl–aryl coupling is unarguably the most prominent tool for the fabrication of covalently bonded carbon‐based nanomaterials. Despite its importance, the reaction kinetics are still poorly understood.
Samuel Stolz +2 more
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Photohomolysis and Photoheterolysis in Aryl Sulfonates and Aryl Phosphates
Chemistry – A European Journal, 2021AbstractThe photochemical behaviour of selected aryl sulfonates and phosphates (ArOX) in polar and nonpolar media has been investigated by laser flash photolysis (LFP) experiments. Two main pathways have been identified, namely the photohomolysis of the ArO−X bond or the photoheterolysis of the Ar−OX bond depending on the nature of the leaving group ...
Sergio Bonesi +2 more
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N‐Arylation of Diketopyrrolopyrroles with Aryl Triflates
Chemistry – An Asian Journal, 2020AbstractA new methodology for the double N‐arylation of diketopyrrolopyrroles with aryl triflates has been developed. It is now possible to prepare diketopyrrolopyrroles bearing N‐substituents derived from naphthalene, anthracene and coumarin in two steps from commercially available phenols. This represents the first time arenes lacking strong electron‐
Krzysztof Gutkowski +4 more
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Palladium-Catalyzed Aryl–Aryl Coupling
ChemInform, 2003AbstractFor Abstract see ChemInform Abstract in Full Text.
ANASTASIA L, NEGISHI E
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Recent advances in aryl–aryl bond formation by direct arylation
Chemical Society Reviews, 2009The abundance of the biaryl structural motif in natural products, in biologically active molecules and in materials chemistry has positioned aryl-aryl (Ar-Ar) bond formation high on the agenda of synthetic chemists. For decades well-known reactions such as the Mizoroki-Heck and Suzuki-Miyaura have been the methods of choice to furnish biaryls.
Gerard P, McGlacken, Lorraine M, Bateman
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Arylation of Aldehyde Homoenolates with Aryl Bromides
Organic Letters, 2013A mild palladium catalyzed coupling of reactive aldehyde homoenolates with aryl bromides is described. Aldehyde homoenolates are generated by ring opening of cyclopropanols via a C-C cleavage step. The coupling generates aldehyde products at room temperature in 59-93% yield.
Kevin, Cheng, Patrick J, Walsh
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Aryl—Aryl Bond Formation by Transition‐Metal‐Catalyzed Direct Arylation
ChemInform, 2007AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Dino, Alberico +2 more
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Deoxygenative Arylation of Carboxylic Acids by Aryl Migration
Chemistry – A European Journal, 2019AbstractAn unprecedented deoxygenative arylation of aromatic carboxylic acids has been achieved, allowing the construction of an enhanced library of unsymmetrical diaryl ketones. The synergistic photoredox catalysis and phosphoranyl radical chemistry allows for precise cleavage of a stronger C−O bond and formation of a weaker C−C bond by 1,5‐aryl ...
Rehanguli Ruzi +8 more
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Efficient Copper-Catalyzed N-Arylation of Sulfoximines with Aryl Iodides and Aryl Bromides
The Journal of Organic Chemistry, 2005Two simple and inexpensive systems for copper-catalyzed N-arylations of sulfoximines with aryl bromides and aryl iodides have been developed. Using 10 mol % of a copper(I) salt in combination with 20 mol % of a 1,2-diamine and Cs2CO3 provides N-arylated sulfoximines in high yields. Various functional groups and heteroatoms are tolerated.
Jörg, Sedelmeier, Carsten, Bolm
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Palladium-Catalyzed N-Arylation of Sulfoximines with Aryl Bromides and Aryl Iodides
The Journal of Organic Chemistry, 1999Various N-arylated sulfoximines have been synthesized in high yield by a direct approach which is based on a palladium-catalyzed cross-coupling strategy. Aryl bromides of variable substitution pattern were found to be the most effective coupling partners, whereas aryl iodides showed a nonpredictable behavior requiring lithium or silver salts as ...
, Bolm, , Hildebrand
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