Palladium-Catalyzed Cross-Coupling of Aryl Chlorides with Arylsilatranes
摘要:
The cross-coupling reactions of arylsilatranes with readily available and inexpensive aryl chlorides were carried out in toluene/THF at 100 degrees C for 3 h in the presence of tetrabutylammonium fluoride as an activator for smooth transmetalation and catalytic amounts of palladium(II) acetate and XPhos.
Cu-Catalyzed Arylation of Bromo-Difluoro-Acetamides by Aryl Boronic Acids, Aryl Trialkoxysilanes and Dimethyl-Aryl-Sulfonium Salts: New Entries to Aromatic Amides
作者:Satenik Mkrtchyan、Michał Jakubczyk、Suneel Lanka、Michael Pittelkow、Viktor O. Iaroshenko
DOI:10.3390/molecules26102957
日期:——
copper-catalyzed directarylation. Readily available and structurally simple aryl precursors such as arylboronicacids, aryl trialkoxysilanes and dimethyl-aryl-sulfonium salts were used as the source for the aryl substituents. The scope of the reactions was tested, and the reactions were insensitive to the electronic nature of the aryl groups, as both electron-rich and electron-deficient aryls were successfully
We describe herein a regioselective palladium(II)-catalyzedintermolecularhydroarylation of unactivated aliphatic alkenes with electronically and sterically diverse (hetero)arylsilanes under redox-neutral conditions. A removable bidentate 8-aminoquinoline auxiliary was readily employed to dictate the regioselectivity, prevent β-hydride elimination, and facilitate protodepalladation. This silicon-based
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
The first palladium-catalyzed Hiyama cross-coupling of arylsilanes with benzyltrimethylammonium salts is reported. The reaction proceeds smoothly to facilitate C(sp2)-C(sp3) bond formation via cleavage of the C-N bond and provides a useful approach to various diarylmethanes with a broad substrate scope and excellent functional group tolerance in good to excellent yields.
Palladium-catalyzed synthesis of 2,3-disubstituted indoles <i>via</i> arylation of <i>ortho</i>-alkynylanilines with arylsiloxanes
作者:Yang-Ting Hsia、Yu-Lin Lu、Rekha Bai、Satpal Singh Badsara、Chin-Fa Lee
DOI:10.1039/d3ob00961k
日期:——
study, we report the electrophiliccyclization of N,N-dimethyl-o-alkynylanilines with arylsiloxanes in the presence of [Pd(OAc)2] and Ag2O catalytic system, which leads to the efficient synthesis of indoles, similar to the one that is obtained through Larock indole synthesis. A range of aryl(trimethoxy)silanes with EDGs and EWGs were successfully utilized for the synthesis of a diverse variety of substituted