Catalytic Electrochemical C–H Iodination and One-Pot Arylation by ON/OFF Switching of Electric Current
摘要:
Palladium-catalyzed electrochemical iodination and one-pot arylation of arylpyridines are described. Ortho-selective C-H iodination proceeded via dual activation of each substrate by a palladium catalyst and an electrode. Various aryl groups were introduced at the ortho positions of arylpyridines by ON/OFF switching of two different catalytic cycles using the same palladium catalyst in a one-pot fashion.
[EN] PROCESS FOR FORMING A CARBON-CARBON BOND<br/>[FR] PROCÉDÉ DE FORMATION D'UNE LIAISON CARBONE-CARBONE
申请人:UNIV MANCHESTER
公开号:WO2019215426A1
公开(公告)日:2019-11-14
A process for forming a carbon-carbon bond to couple an aryl or heteroaryl group of a first compound with an aryl or heteroaryl group of a second compound, the process comprising reacting the first compound with the second compound in the presence of a catalytically effective amount of a neutral or cationic ruthenium(II) catalyst of formula (I):
Ambient temperatureruthenium‐catalyzedC−H arylations were accomplished by visiblelight without additional photocatalysts. The robustness of the ruthenium‐catalyzedC−H functionalization protocol was reflected by a broad range of sensitive functional groups and synthetically useful pyrazoles, triazoles and sensitive nucleosides and nucleotides, as well as multifold C−H functionalizations. Biscyclometalated
Ru-catalyzed aerobic oxidative coupling of arylboronic acids with arenes
作者:Hong Li、Wei Wei、Yuan Xu、Chao Zhang、Xiaobing Wan
DOI:10.1039/c0cc04322b
日期:——
A Ru-catalyzedoxidativecoupling of arenes with boronic acids using molecular oxygen via direct C-H activation is reported. Both the scope and the mechanism of the process are discussed.
One‐Pot Tandem Photoredox and Cross‐Coupling Catalysis with a Single Palladium Carbodicarbene Complex
作者:Yu‐Cheng Hsu、Vincent C.‐C. Wang、Ka‐Chun Au‐Yeung、Chung‐Yu Tsai、Chun‐Chi Chang、Bo‐Chao Lin、Yi‐Tsu Chan、Chao‐Ping Hsu、Glenn P. A. Yap、Titel Jurca、Tiow‐Gan Ong
DOI:10.1002/anie.201800951
日期:2018.4.16
transition‐metal‐catalyzed coupling (2 e− process) and photoredox catalysis (1 e− process) has emerged as a powerful approach to catalyze difficult cross‐coupling reactions under mild reaction conditions. Reported is a palladium carbodicarbene (CDC) complex that mediates both a Suzuki–Miyaura coupling and photoredox catalysis for C−N bond formation upon visible‐light irradiation. These two catalytic pathways
Helical Carbenium Ion: A Versatile Organic Photoredox Catalyst for Red-Light-Mediated Reactions
作者:Liangyong Mei、José M. Veleta、Thomas L. Gianetti
DOI:10.1021/jacs.0c05507
日期:2020.7.15
m (nPr-DMQA+) tetrafluoroborate) has been used as an organic photoredox catalyst for photoreductions and photooxidations in the presence of red light (λmax = 640 nm). It has catalyzed red-light-mediated dual transition-metal/photoredox-catalyzed C-H arylation and intermolecular atom transfer radical addition through oxidative quenching. Moreover, its potential in photooxidation catalysis has also been