Sulfoxide-mediated oxidative cross-coupling of phenols
作者:Zhen He、Gregory J. P. Perry、David J. Procter
DOI:10.1039/c9sc05668h
日期:——
A metal-free, oxidative coupling of phenols with various nucleophiles, including arenes, 1,3-diketones and other phenols, is reported. Cross-coupling is mediated by a sulfoxide which inverts the reactivity of the phenol partner. Crucially, the process shows high selectivity for cross-versus homo-coupling and allows efficient access to a variety of aromatic scaffolds including biaryls, benzofurans and
Metal‐ and Reagent‐Free Highly Selective Anodic Cross‐Coupling Reaction of Phenols
作者:Bernd Elsler、Dieter Schollmeyer、Katrin Marie Dyballa、Robert Franke、Siegfried R. Waldvogel
DOI:10.1002/anie.201400627
日期:2014.5.12
The direct oxidative cross‐coupling of phenols is a very challenging transformation, as homo‐coupling is usually strongly preferred. Electrochemical methods circumvent the use of oxidizing reagents or metal catalysts and are therefore highly attractive. Employing electrolytes with a high capacity for hydrogen bonding, such as methanol with formic acid or 1,1,1,3,3,3‐hexafluoro‐2‐propanol, a direct
Monophosphites having an unsymmetric biaryl structure and metal complexes thereof are provided. The metal complex compositions are useful as hydroformylation catalysts. The metals of the complex include Rh, Ru, Co and Ir. A method of hydroformylation using the metal complex or the metal complex components is also provided.