Active Molybdenum-Based Anode for Dehydrogenative Coupling Reactions
作者:Sebastian B. Beil、Timo Müller、Sydney B. Sillart、Peter Franzmann、Alexander Bomm、Michael Holtkamp、Uwe Karst、Wolfgang Schade、Siegfried R. Waldvogel
DOI:10.1002/anie.201712718
日期:2018.2.23
and powerful active anode system that can be operated in 1,1,1,3,3,3‐hexafluoro‐2‐propanol (HFIP) has been discovered. In HFIP the molybdenum anode forms a compact, conductive, and electroactive layer of higher‐valent molybdenum species. This system can replace powerful but stoichiometrically required MoV reagents for the dehydrogenative coupling of aryls. This electrolytic reaction is more sustainable
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
Nitrosonium-Mediated Phenol–Arene Cross-Coupling Involving Direct C–H Activation
作者:Anna Eisenhofer、Uta Wille、Burkhard König
DOI:10.1071/ch16622
日期:——
for the in situ formation of NO+ from readily available inorganic nitrate salts, i.e. lithium nitrate, through a finely tuned interplay between formic acid and MeOH, which are used as the solvent system. This methodology was applied to the NO+-induced oxidative C–H activation of methoxy-substituted phenols, which are versatile lignin-derived aromatic feedstocks, to achieve C–C cross-coupling reactions
We have developed a heterogeneous catalytic oxidative homocoupling reaction of dimethoxyanilides under an oxygen atmosphere. The resulting homo-dimers are useful for the construction of heterocycles, demonstrating the potential of heterogeneous metal catalysts.