Efficient Anodic and Direct Phenol-Arene C,C Cross-Coupling: The Benign Role of Water or Methanol
作者:Axel Kirste、Bernd Elsler、Gregor Schnakenburg、Siegfried R. Waldvogel
DOI:10.1021/ja211005g
日期:2012.2.22
reactions for the synthesis of nonsymmetrical biaryls represent one of the most significant transformations in contemporary organic chemistry. A variety of useful synthetic methods have been developed in recent decades, since nonsymmetrical biaryls play an evident role in natural product synthesis, as ligand systems in homogeneous catalysis and materials science. Transformation of simple arenes by direct
Photocatalytic Phenol-Arene C-C and C-O Cross-Dehydrogenative Coupling
作者:Anna Eisenhofer、Johnny Hioe、Ruth M. Gschwind、Burkhard König
DOI:10.1002/ejoc.201700211
日期:2017.4.18
an important role in natural-product synthesis, as ligands in metal catalysis, and in organic functional materials. Their synthesisthrough cross-coupling reactions by two-fold direct C–H activation are important and challenging transformations. In the last decade, a variety of useful oxidative methods have been developed. The key to efficiency and selectivity typically is the application of highly
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
A simple, metal-free protocol for unsymmetrical biaryl coupling using H5IO6 is reported. H5IO6 was evaluated for a novel application in the oxidative cross-coupling of phenol-arene, phenol-phenol, and phenol-naphthol compounds. In this work, most of the couplings were completed within 30 min at ambient temperature. 30 coupling products were conveniently obtained using only 0.5 equivalent of H5IO6 in