Highly Selective and Divergent Acyl and Aryl Cross-Couplings of Amides via Ir-Catalyzed C–H Borylation/N–C(O) Activation
作者:Pengcheng Gao、Michal Szostak
DOI:10.1021/acs.orglett.0c02105
日期:2020.8.7
Herein, we demonstrate that amides can be readily coupled with nonactivated arenes via sequential Ir-catalyzed C–H borylation/N–C(O) activation. This methodology provides facile access to biaryl ketones and biaryls by the sterically controlled Ir-catalyzed C–H borylation and divergent acyl and decarbonylative amide N–C(O) and C–C activation. The methodology diverts the traditional acylation and arylation
Superphenylphosphines: Nanographene-Based Ligands That Control Coordination Geometry and Drive Supramolecular Assembly
作者:Jordan N. Smith、James M. Hook、Nigel T. Lucas
DOI:10.1021/jacs.7b12251
日期:2018.1.24
is dependent on the number of HBC substituents. The crystalline structures of five complexes all show intramolecular π-stacking between HBC-phosphines to form a supramolecular bidentate-like ligand that distorts the metal coordinationgeometry. When n = 2 or 3, the additional HBC substituents engage in intermolecular π-stacking to assemble the complexes into continuous ribbons or sheets. The phosphines
Very Fast Suzuki-Miyaura Reaction Catalyzed by Pd(OAc)2 under Aerobic Conditions at Room Temperature in EGME/H2O
作者:Alessandro Del Zotto、Francesco Amoroso、Walter Baratta、Pierluigi Rigo
DOI:10.1002/ejoc.200800874
日期:——
The results of a ligand-free Pd(OAc)2-catalyzed Suzuki–Miyaura C–C coupling performed at room temperature underaerobicconditions are presented. It was found that the use of an ethylene glycol monomethyl ether/H2O mixture as the solvent resulted in very rapid reactions of aryl bromides with arylboronic acids. As a matter of fact, under optimized conditions, some substrates were converted quantitatively
NiCl<sub>2</sub>(dppe)-Catalyzed Cross-Coupling of Aryl Mesylates, Arenesulfonates, and Halides with Arylboronic Acids
作者:Virgil Percec、Geoffrey M. Golding、Jan Smidrkal、Oliver Weichold
DOI:10.1021/jo049940i
日期:2004.5.1
the cross-coupling of electron-poor aryl mesylates, tosylates, chlorides, bromides, and iodides. This catalyst was also efficient in the cross-coupling of aryl bromides and iodides containing electron-donating substituents. Most surprisingly, the replacement of the excess dppe from NiCl2(dppe)/dppe with excess PPh3 generated NiCl2(dppe)/PPh3, which was found to be reactive for the cross-coupling of
Two mono-benzimidazolium salts of resorcinarene have been prepared and used as ligands in Suzuki--Miyaura cross-coupling reactions. They have been fully characterized by $^1}$H and $^13}$C NMR, MALDI, and FT-IR spectroscopic methods, and their structures were confirmed by X-ray diffraction analysis. These two new resorcinarene-based mono-benzimidazolium salts showed good catalytic activity for coupling reactions in DMF. The highest conversion was achieved for arylation of 4-bromotoluene using the resorcinarenyl mono-dimethylbenzimidazolium salt.