Three-Component Oxyarylation of Alkenes Enables Access to C<sub>3</sub>-Substituted Dihydrobenzofurans
作者:Guidong Feng、Shutao Sun、Guoliang Liu、Huan Long、Lei Liu
DOI:10.1021/acs.orglett.8b03278
日期:2018.12.7
A practical and modular three-component alkene oxyarylation with benzoquinone and H2O to rapidly access C-3-substituted dihydrobenzofurans has been developed. The (NH4)(2)S2O8-mediated redox-relay process has an excellent regioselectivity and functional group tolerance and exhibits a broad scope of simple alkenes, rapidly furnishing a variety of the substructures that would require multiple steps to prepare with traditional methods. Mechanistic studies revealed a dual role of benzoquinone serving as both the arylation agent and the origin of dihydroquinone for the reductive cyclization step.
Laser photochemistry: trapping of quinone-olefin preoxetane intermediates with molecular oxygen and chemistry of the resulting 1,2,4-trioxanes
作者:R. Marshall Wilson、Stephen W. Wunderly、Thomas F. Walsh、Arlene K. Musser、Russell Outcalt、Fiona Geiser、Stephen K. Gee、Wayne Brabender、Lario Yerino