Mechanistic Insight into Direct Arylations with Ruthenium(II) Carboxylate Catalysts
摘要:
Mechanistic studies revealed ruthenium-catalyzed direct arylations to proceed through reversible C-H bond activation and subsequent rate-limiting oxidative addition with aryl halides, which led to the development of widely applicable well-defined ruthenium(II) carboxylate catalysts.
Cobalt-Catalyzed CH Bond Functionalizations with Aryl and Alkyl Chlorides
作者:Benudhar Punji、Weifeng Song、Grigory A. Shevchenko、Lutz Ackermann
DOI:10.1002/chem.201301409
日期:2013.8.5
catalytic CH bond arylations on heteroaryl‐substituted arenes with widely available aryl chlorides, which set the stage for the preparation of sterically hindered tri‐ortho‐substituted biaryls. Likewise, challenging direct alkylations with β‐hydrogen‐containing primary and even secondary alkyl chlorides proceeded on pyridyl‐ and pyrimidyl‐substituted arenes and heteroarenes. The cobalt‐catalyzed CH bond
<i>Ortho</i> C–H arylation of arenes at room temperature using visible light ruthenium C–H activation
作者:Arunachalam Sagadevan、Anastasios Charitou、Fen Wang、Maria Ivanova、Martin Vuagnat、Michael F. Greaney
DOI:10.1039/d0sc01289k
日期:——
A ruthenium-catalyzedortho C–H arylation process is described using visible light. Using the readily available catalyst [RuCl2(p-cymene)]2, visible light irradiation was found to enable arylation of 2-aryl-pyridines at room temperature for a range of aryl bromides and iodides.