Urea‐Substituted Tetramethylcyclopentadienyl Ligands for Supramolecularly Accelerated Rh
<sup>III</sup>
‐Catalyzed
<i>ortho</i>
‐C−H Olefination of Benzoic Acid Derivatives
作者:David Maurer、Bernhard Breit
DOI:10.1002/chem.202005130
日期:2021.2.5
Through kinetic studies and NMR titration experiments, the catalysts’ substrate recognition ability mediated by hydrogenbonding was identified to be the reason for this effect. Introduction of pyridone‐phosphine ligands capable of forming additional H‐bond interactions increased the catalytic performance even further. By unveiling a proportionality between reaction rate and relative complex formation
Ruthenium-Catalyzed Oxidative C–H Alkenylations of Anilides and Benzamides in Water
作者:Lutz Ackermann、Lianhui Wang、Ratnakancana Wolfram、Alexander V. Lygin
DOI:10.1021/ol203251s
日期:2012.2.3
A cationic ruthenium(II) complex enabled efficient oxidative alkenylations of anilides in water as a green solvent and proved applicable to double C-H bond functionalizations of (hetero)aromatic amides with ample scope. Detailed studies provided strong support for a change of ruthenation mechanism in the two transformations, with an irreversible metalation as the key step in cross-dehydrogenative alkenylations of benzamides.