Integrated Electrochemical–Chemical Oxidation Mediated by Alkoxysulfonium Ions
作者:Yosuke Ashikari、Toshiki Nokami、Jun-ichi Yoshida
DOI:10.1021/ja202880n
日期:2011.8.10
electrochemical-chemical oxidation can be applied to the oxidation of diarylmethanes to diaryl ketones, toluenes to benzaldehydes, and aryl-substituted alkenes to 1,2-diketones. Moreover, the oxidation of unsaturated compounds bearing a nucleophilic group in an appropriate position gives cyclized carbonyl compounds.
Integration of electrooxidative cyclization and chemical oxidation via alkoxysulfonium ions. Synthesis of exocyclic ketones from alkenes with cyclization
作者:Yosuke Ashikari、Toshiki Nokami、Jun-ichi Yoshida
DOI:10.1039/c3ob40315g
日期:——
An integration of electrooxidative cyclization and chemical oxidation was achieved. Electrochemical oxidation of alkenes having a nucleophilic moiety in the presence of DMSO gave cyclized alkoxysulfonium ions, which were converted to the corresponding ketones by treatment with triethylamine in a one-pot sequential manner. The method is also an effective tool for cyclization of 1,6-dienes affording five-membered ring diketones in high stereoselectivity.