Directed Palladium-Catalyzed
Oxidative C-H Arylation of (Hetero)arenes with Arylboronic
Acids by Using TEMPO
作者:Armido Studer、Sylvia Kirchberg、Thomas Vogler
DOI:10.1055/s-0028-1083546
日期:——
Oxidative coupling of three different arenes and a thiophene derivative with various arylboronicacids with Pd(OAc) 2 and the commercially available 2,2,6,6-tetramethylpiperidine-N-oxyl radical (TEMPO) as an oxidant are reported. A 2-pyridyl group on the substrates serves as ortho-directing group to mediate the C-H arylation. Mechanistic studies are provided.
Copper‐Catalyzed Direct Arylation of Indoles and Related (Hetero)arenes: A Ligandless and Solvent‐free Approach
作者:Dilip K. Pandey、Anand B. Shabade、Benudhar Punji
DOI:10.1002/adsc.202000312
日期:2020.6.15
A ligandless and solvent‐free copper‐catalyzed method for the regioselective C−H bond arylation of indoles and related heteroarenes is reported. The use of CuCl efficiently catalyzes the direct coupling of diverse heteroarenes with aryl iodides via chelation‐assistance. This reaction could tolerate sensitive and structurally diverse functionalities, including halides, ethers, thioethers, amines, indolyl