ONSH: Optimization of Oxidative Alkylamination Reactions through Study of the Reaction Mechanism
作者:Stefan Verbeeck、Wouter A. Herrebout、Anna V. Gulevskaya、Benjamin J. van der Veken、Bert U. W. Maes
DOI:10.1021/jo100858n
日期:2010.8.6
Oxidativealkylamination of electron-deficient (hetero)aromatic compounds, via the nucleophilic substitution of hydrogen, is a methodology that has made significant progress since the introduction of AgPy2MnO4 as oxidant. This oxidant generally gives good conversions and yields, whereas the use of KMnO4 only sometimes works equally well. In order to rationalize this, the reaction mechanism of oxidative
Alkylation of nitroarenes via VicariousNucleophilicSubstitution (VNS) was tested experimentally and modelled with DFT calculations. Mechanistic studies reveal intrinsic differences between reactions of archetypal carbanion precursor PhSO2CH2Cl, and alkyl phenyl sulfones, in which benzenesulfinate acts as a leaving group. Accordingly, for the latter precursors steric hindrance develops at the β-elimination