摘要
A novel and simple route was developed that gives sparstolonin B in high yields from affordable commercial compounds. 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 Raney nickel.
- 出版日期2017-6
- 单位南京中医药大学