Anion Radical Chain Cycloaddition of Tethered Enones: Intramolecular Cyclobutanation and Diels−Alder Cycloaddition
作者:Yeonsuk Roh、Hye-Young Jang、Vincent Lynch、Nathan L. Bauld、Michael J. Krische
DOI:10.1021/ol0172065
日期:2002.2.1
[reaction: see text] The anion radicals of certain bis(enones), generated by cathodic reduction, are observed to participate in intramolecular cyclobutanation, yielding bicyclo[3.2.0]heptane derivatives through an anion radicalchainmechanism. Evidence for stepwise cycloaddition involving distonic anion radical intermediates is presented. In addition to the novel anion radical cyclobutanations, an