Oxygenation of cyclic diphenyl iodoniums (CDPIs) with varied medium‐ring sizes has been fully investigated. This practical copper‐catalyzed tandem reaction of CDPIs with water as the oxygensource enables the construction of derivatised dibenzofurans and xanthenes at moderate to good yields. Moreover, structurally important xanthones are also successfully accessed under the oxygenation conditions with
A New Process for the Total Synthesis of Sparstolonin B
作者:Haitao Yu、Xiaohang Tang、Le Tong、Mengyi Yao、Qiaoli Liang、Xiaolong Wang
DOI:10.1055/s-0036-1588723
日期:2017.6
A Diels–Alder strategy was used for the facile construction of the multisubstituted diphenyl ether. The xanthenone segment was obtained by cyclization in an intramolecular Friedel–Crafts reaction, followed by selective reduction of a ketone group and a transformation from a hydroxy group into a cyano group. The final part of the lactone was directly derived by the reduction of the cyano group with