Catalytic, Atom-Economical Radical Arylation of Epoxides
作者:Andreas Gansäuer、Maike Behlendorf、Daniel von Laufenberg、André Fleckhaus、Christian Kube、Dhandapani V. Sadasivam、Robert A. Flowers
DOI:10.1002/anie.201200431
日期:2012.5.7
A slow electron waltz: Catalysis in single‐electron steps with radicals as intermediates is essential for an atom‐economical arylation of epoxides with a proton‐coupled electron transfer as a key step. Stabilization of the catalyst is essential for low catalyst loading, as demonstrated by reaction‐progress kinetic analysis, cyclic voltammetry, and calculations.
Cationic Titanocene(III) Complexes for Catalysis in Single-Electron Steps
作者:Andreas Gansäuer、Sven Hildebrandt、Antonius Michelmann、Tobias Dahmen、Daniel von Laufenberg、Christian Kube、Godfred D. Fianu、Robert A. Flowers
DOI:10.1002/anie.201501955
日期:2015.6.8
By exploiting solvent and anion effects, [Cp2Ti]+ complexes for atom‐economical catalysis in single‐electron steps were developed and applied for the first time. These complexes constitute remarkably stable and active catalysts for radical arylations. The reaction kinetics and catalyst composition were studied by cyclic voltammetry and in situ IR spectroscopy.