Rhodium-catalyzed regioselective direct C–H arylation of indoles with aryl boronic acids
作者:Liang Wang、Xing Qu、Zhan Li、Wang-Ming Peng
DOI:10.1016/j.tetlet.2015.04.015
日期:2015.6
A highly efficient Rh(III)-catalyzed direct C–H arylation of indoles with arylboronicacids under mild conditions has been developed. The methodology features wide substrate scope and excellent functional group compatibility (34 examples, up to 99% yield). The arylated products can also be conveniently transformed into biologically active polycyclic indole derivatives.
We report a chelation-assisted C–H arylation of various indoles with sterically and electronically diverse (hetero)arylsilanes enabled by cost-effective Cp*-free cobaltcatalysis. Key to the success of this strategy is the judicious choice of copper(II) fluoride as a bifunctional sliane activator and catalyst reoxidant. This methodology features a broad substrate scope and good functional group compatibility
Ru-Catalysed CH Arylation of Indoles and Pyrroles with Boronic Acids: Scope and Mechanistic Studies
作者:Carina Sollert、Karthik Devaraj、Andreas Orthaber、Paul J. Gates、Lukasz T. Pilarski
DOI:10.1002/chem.201405931
日期:2015.3.27
The Ru‐catalysed C2Harylation of indoles and pyrroles by using boronicacids under oxidative conditions is reported. This reaction can be applied to tryptophan derivatives and tolerates a wide range of functional groups on both coupling partners, including bromides and iodides, which can be further derivatised selectively. New indole‐based ruthenacyclic complexes are described and investigated as
We describe a method for intramolecular desulfonylative coupling using bis(cyclooctadiene)nickel as a catalyst. A broad range of aromatic, heteroaromatic and aliphatic sulfones can be utilized as substrates in this process. This method provides an atom‐economical route to the synthesis of various biaryls and an efficient tool for the catalytic conversion of sulfonyl groups, representing a significant
The nickel-catalyzed decarbonylation of unstrained diaryl ketones has been developed. The reaction is catalyzed by a combination of Ni(cod)2 and an electron-rich N-heterocyclic carbene ligand. High functional group tolerance and excellent yields (up to 98%) are observed. This strategy provides an alternative and versatile approach to construct biaryls using an inexpensive nickel catalyst.