Palladium catalyzed synthesis of aryl thiols: sodium thiosulfate as a cheap and nontoxic mercapto surrogate
摘要:
A Pd-catalyzed coupling reaction of ArBr/ArCl/ArOTf with sodium thiosulfate takes place in presence of Cs2CO3 at 80 degrees C. The reaction mixture is directly treated with Zn/HCl to afford aryl thiols in good to excellent yields. (C) 2010 Elsevier Ltd. All rights reserved.
Palladium-Catalyzed Decarboxylative Couplings of 2-(2-Azaaryl)acetates with Aryl Halides and Triflates
作者:Rui Shang、Zhi-Wei Yang、Yan Wang、Song-Lin Zhang、Lei Liu
DOI:10.1021/ja107103b
日期:2010.10.20
Pd-catalyzed decarboxylative cross-couplings of 2-(2-azaaryl)acetates with arylhalides and triflates have been discovered. This reaction is potentially useful for the synthesis of some functionalized pyridines, quinolines, pyrazines, benzoxazoles, and benzothiazoles. Theoretical analysis shows that the nitrogen atom at the 2-position of the heteroaromatics directly coordinates to Pd(II) in the decarboxylation
Synthesis of Acyl Alkenylindium Reagents and Their Application in the Synthesis of (<i>Z</i>)-α,β-Unsaturated Ketones <i>via</i> Palladium-Catalyzed Cross-Coupling Reaction
作者:Youngchul Park、Jiae Min、Dahan Eom、Phil Ho Lee
DOI:10.1021/acs.orglett.5b02043
日期:2015.8.7
was developed involving the hydroindation reaction of allenyl ketones with indium and indium chloride in methanol under mild conditions. Their synthetic applications were demonstrated fromPd-catalyzedcross-coupling reactions with arylbromides and iodides and alkenyl and aryl triflates for the synthesis of (Z)-α,β-unsaturated ketones.
Biaryl and Aryl Ketone Synthesis via Pd-Catalyzed Decarboxylative Coupling of Carboxylate Salts with Aryl Triflates
作者:Lukasâ J. Goossen、Christophe Linder、Nuria RodrÃguez、Paulâ P. Lange
DOI:10.1002/chem.200900892
日期:2009.9.21
the first time allows the decarboxylative cross‐coupling of aryl and acyl carboxylates with aryl triflates. In contrast to aryl halides, these electrophiles give rise to non‐coordinating anions as byproducts, which do not interfere with the decarboxylation step that leads to the generation of the carbon nucleophilic cross‐coupling partner. As a result, the scope of carboxylate substrates usable in this
Dynamic Kinetic Cross-Electrophile Arylation of Benzyl Alcohols by Nickel Catalysis
作者:Peng Guo、Ke Wang、Wen-Jie Jin、Hao Xie、Liangliang Qi、Xue-Yuan Liu、Xing-Zhong Shu
DOI:10.1021/jacs.0c12462
日期:2021.1.13
Catalytic transformation of alcohols via metal-catalyzed cross-coupling reactions is very important, but it typically relies on a multistep procedure. We here report a dynamic kinetic cross-coupling approach for the direct functionalization of alcohols. The feasibility of this strategy is demonstrated by a nickel-catalyzed cross-electrophile arylation reaction of benzylalcohols with (hetero)aryl electrophiles
Predictable and Site-Selective Functionalization of Poly(hetero)arene Compounds by Palladium Catalysis
作者:David Lapointe、Thomas Markiewicz、Christopher J. Whipp、Amy Toderian、Keith Fagnou
DOI:10.1021/jo102081a
日期:2011.2.4
addressed by two different approaches. Site-selectivity can be obtained by applying various reaction conditions that are (hetero)arene specific to substrates that contain indoles, pyridine N-oxide, and polyfluorinated benzenes. An experimental classification of electron-rich heteroarenes based on their reactivity toward palladium-catalyzed C−H functionalization was established, the result of which correlated