Synthesis of Aryl Ethers from Aromatic Carboxylic Acids
作者:Lukas Gooßen、Sukalyan Bhadra、Wojciech Dzik
DOI:10.1055/s-0033-1339470
日期:——
meta-substituted carboxylates are converted into para-substituted alkoxyarenes and vice versa. The combined processes provide a convenient synthetic entry to the important class of aromatic ethers from widely available carboxylicacids. A silver/copper bimetallic catalyst system promotes the decarboxylative Chan–Evans–Lam alkoxylation of ortho-substituted aromatic carboxylate salts with tetraalkyl orthosilicates
Decarboxylative Etherification of Aromatic Carboxylic Acids
作者:Sukalyan Bhadra、Wojciech I. Dzik、Lukas J. Goossen
DOI:10.1021/ja304539j
日期:2012.6.20
Decarboxylative Chan-Evans-Lam-type couplings are presented as a new strategy for the regiospecific construction of diaryl and alkyl aryl ethers starting from easily available aromatic carboxylic acids. They allow converting various aromaticcarboxylatesalts into the corresponding aryl ethers by reaction with alkyl orthosilicates or aryl borates, under aerobic conditions in the presence of silver
Decarboxylative Cross-Coupling of Mesylates Catalyzed by Copper/Palladium Systems with Customized Imidazolyl Phosphine Ligands
作者:Bingrui Song、Thomas Knauber、Lukas J. Gooßen
DOI:10.1002/anie.201208025
日期:2013.3.4
The activation of the inert CO bonds in mesylates through the use of a new class of imidazolyl phosphines allows the decarboxylative coupling of aryl mesylates as well as polysubstituted alkenyl mesylates. Variation of the ligands leads to two complementary methods providing the corresponding biaryls and polysubstituted olefins in good yields.
Copper-Mediated Decarboxylative Coupling of Benzamides with <i>ortho</i>
-Nitrobenzoic Acids by Directed C−H Cleavage
作者:Kazutaka Takamatsu、Koji Hirano、Masahiro Miura
DOI:10.1002/anie.201701918
日期:2017.5.2
A copper‐mediated decarboxylative coupling of benzamides with ortho‐nitrobenzoic acids by 8‐aminoquinoline‐directed C−H cleavage has been developed. This reaction proceeds smoothly with only a copper salt to produce the corresponding biaryl compounds in good yields. The products can be easily transformed into various nitrogen‐containing heterocyclic compounds. Moreover, the combination of copper and
Synthesis of Biaryls by Decarboxylative Hiyama Coupling
作者:Dmitry Katayev、Benjamin Exner、Lukas J. Gooßen
DOI:10.1002/cctc.201500068
日期:2015.7.13
A trimetallic palladium/copper/silver system has been developed that allows the decarboxylativeHiyamacoupling of ortho‐substituted aryl carboxylates with trialkoxyarylsilanes to give the corresponding biaryls. The cross‐coupling is catalyzed by a Pd/N‐heterocyclic carbene complex with silver carbonate aiding its reoxidation. Copper(II) fluoride acts as decarboxylation catalyst, stoichiometric oxidant