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