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 Cross-Coupling of Aryl Tosylates with Aromatic Carboxylate Salts
作者:Lukas J. Gooßen、Nuria Rodríguez、Paul P. Lange、Christophe Linder
DOI:10.1002/anie.200905953
日期:2010.2.1
A bimetallic copper/palladium catalyst system is disclosed that enables the use of tosylates as carbon electrophiles in decarboxylative coupling reactions. A variety of aromaticcarboxylatesalts, regardless of their substitution pattern, have been coupled with these inexpensive and readily available electrophiles to give the corresponding biaryl compounds in good yields (see scheme).
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.
Bimetallic Cu/Pd Catalysts with Bridging Aminopyrimidinyl Phosphines for Decarboxylative Cross-Coupling Reactions at Moderate Temperature
作者:Dagmar Hackenberger、Bingrui Song、Matthias F. Grünberg、Saeid Farsadpour、Fabian Menges、Harald Kelm、Cedric Groß、Timm Wolff、Gereon Niedner-Schatteburg、Werner R. Thiel、Lukas J. Gooßen
DOI:10.1002/cctc.201500769
日期:2015.11
catalyst system is presented that enables the decarboxylative cross‐coupling of triflates with carboxylate salts at only 100 °C, which is 70 °C lower than with previous Cu/Pd‐based systems. The new protocol allows the coupling of a broad range of aryl triflates with various substituted 2‐nitrobenzoates in good to excellent yields. The key feature of the catalyst system is a bidentate P,N‐ligand designed
Decarboxylative <i>ipso</i>
Amination of Activated Benzoic Acids
作者:Martin Pichette Drapeau、Janet Bahri、Dominik Lichte、Lukas J. Gooßen
DOI:10.1002/anie.201812068
日期:2019.1.14
the ligand and either air or N‐methylmorpholine N‐oxide as the oxidant, electron‐deficient benzoic acids undergo oxidative decarboxylative coupling with unprotected amines. This operationally simple aniline synthesis is widely applicable with respect to the amine and gives good yields, even on multigram scale. The orthogonality of this reaction to other Pd‐catalyzedcross‐couplings allows the concise