ChemInform Abstract: Aryl—Aryl Bond Formation One Century After the Discovery of the Ullmann Reaction

Abstract

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Biosourced mesoporous carbon with embedded palladium nanoparticles by a one pot soft-template synthesis: application to Suzuki reactions

“…It is important to note that the 55 amount of supported palladium required here is extremely low compared to the amount traditionnally used both in homogeneous or heterogeneous catalysis for Suzuki couplings. 37,90 For practical reasons, we decided to use Pd@MC X1 to pursue our study. Then, we determined the amount of palladium lost in the crude 60 mixture at the end of the reaction (according to table 1, entry 11 but using 50 times the amount of reagents).…”

“…This coupling finds numerous applications in the fields of pharmaceuticals 32,33 , OLED materials 34 , liquid crystals 35 , metal ligands for catalysis and molecular recognition. 36 The Suzuki reaction is traditionnally performed by reacting aryl 25 halides with areneboronic acids using a homogeneous (soluble) palladium catalyst in amounts of 10-50 mequiv 37,38 . Moreover, the Suzuki reaction presents the important drawback that the expensive soluble catalyst is difficult to recover for reuse, whereas palladium is a scarce natural resource which should be 30 preserved.…”

Selective Mesitylene Oxidative Coupling Reaction by Metastructured Electrocatalyst Comprised of Carbonaceous Scaffold Coated with Pd Derived from Zeolitic Imidazole Framework

“…Bimesityl is a feedstock for synthesizing materials for organic light emitting diodes [41], organic solar cells [42] and organic thin-film transistors [43]. Conventionally Bimesityl is produced by a thermal cross-coupling reaction [44] involving moisture-sensitive Grignard reagent and hard-to-control free radical pathway [45], leading to the formation of unexpected by-products. Another drawback of this conventional thermal method is the requirement of additional separation processes due to the formation of by-products besides the desired bimesityl product [46].…”

Synthesis of Composition Tunable and (111)-Faceted Cu/Cu2O Nanoparticles toward Photocatalytic, Ligand-Free, and Solvent-Free C–N Ullmann Coupling Reactions

“…However, it involves high temperature, strong alkalinity, and long reaction time, which results in environmental pollution and severe energy consumption. 1 In order to improve the reaction processes, many researchers have made significant efforts to enhance catalysis efficiency. For example, the copper-catalyzed Ullmann coupling reaction between aryl halides and amines has been extensively studied in recent years 2 to find efficient methods to form a carbon−nitrogen (C−N) bond 3,4 since the nitrogencontaining organic compounds have been found functionally important in the pharmaceutical, functional materials, and agricultural science areas.…”