Results 211 to 220 of about 3,271,959 (246)

High-Yielding Intramolecular Direct Arylation Reactions with Aryl Chlorides

Organic Letters, 2005
[reaction: see text] An N-heterocyclic carbene palladium catalyst system is used to promote direct arylation of a broad range of aryl chlorides to form six- and five-membered ring biaryls. An influence of the halide on the palladium precatalyst on catalyst activation has been revealed, as has a beneficial effect of NHC salts that allows the turnover ...
Louis-Charles, Campeau, Praew, Thansandote, Keith, Fagnou   +2 more
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Direct amination of aryl halides with ammonia

Chemical Society Reviews, 2010
The traditional homogeneous access to aromatic amine derivatives is a nucleophilic aromatic substitution of the corresponding aryl halides. The halogen atom is usually relatively inert to amination reaction unless it is activated by the presence of electron withdrawing groups. Consequently, there has been particular emphasis over the past decade on the
Aubin, Yoann, Fischmeister, Cédric, Thomas, C., Renaud, J.-L.   +3 more
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Direct Palladium-Catalyzed Arylation of Cyclopropenes

Journal of the American Chemical Society, 2005
The first examples of direct palladium-catalyzed arylation and heteroarylation of cyclopropenes have been demonstrated. This method allows for efficient synthesis of various tetrasubstituted cyclopropenes, incuding nonracemic cyclopropenes, which are not available via known asymmetric cyclopropenation methods.
Stepan, Chuprakov, Michael, Rubin, Vladimir, Gevorgyan   +2 more
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Direct Arylations of 2H-Indazoles On Water [PDF]

Organic Letters, 2009
The efficient palladium-catalyzed synthesis of a range of substituted 2H-Indazoles via C-H arylation is reported. Reactions are performed on water and provide a direct and mild route toward 2,3-diaryl indazoles of widespread biological significance.
Ohnmacht, Stephan A., Culshaw, Andrew J., Greaney, Michael F.   +2 more
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Allocolchicinoid Synthesis via Direct Arylation

Organic Letters, 2005
[reaction: see text] A formal enantioselective synthesis of allocolchicine and a synthesis of a C-ring analogue have been achieved by employing an intramolecular direct arylation of an aryl chloride to form the biaryl carbon-carbon bond and the seven-membered ring.
Mélissa, Leblanc, Keith, Fagnou
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Palladium‐Catalyzed Direct Arylation of Thiazoles with Aryl Bromides.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Aya Yokooji, Toru Okazawa, Tetsuya Satoh, Masahiro Miura, Masakatsu Nomura   +4 more
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Palladium-Catalyzed Direct Arylation of Aryl(azaaryl)methanes with Aryl Halides Providing Triarylmethanes

Organic Letters, 2007
Direct arylation of aryl(azaaryl)methanes with aryl halides takes place at the benzylic position in the presence of a hydroxide base under palladium catalysis to yield triarylmethanes.
Niwa, Takashi, Yorimitsu, Hideki, Oshima, Koichiro   +2 more
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Copper-mediated direct arylation of benzoazoles with aryl iodides

Tetrahedron Letters, 2008
Abstract The direct arylation of 1,3-benzoazole compounds with aryl iodides is effectively promoted by CuI with use of PPh 3 and Na 2 CO 3 or K 3 PO 4 as ligand and base, respectively, in DMF or DMSO to produce the corresponding 2-arylated products with good yields.
Tomoki Yoshizumi, Hayato Tsurugi, Tetsuya Satoh, Masahiro Miura   +3 more
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Direct arylation of azine N-oxides with aryl triflates

Tetrahedron, 2009
Palladium catalyzed direct arylation of azine N-oxides using aryl triflates to afford the corresponding 2-aryl azine N-oxides is described. The reaction is carried out with a range of both N-oxides and aryl triflates. The arylation can be carried out in sequence to yield differentially diarylated products.
Derek J. Schipper, Mohamed El-Salfiti, Christopher J. Whipp, Keith Fagnou   +3 more
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ChemInform Abstract: Recent Advances in Aryl—Aryl Bond Formation by Direct Arylation

ChemInform, 2009
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Gerard P. McGlacken, Lorraine M. Bateman
openaire   +1 more source