by oxidative dearomatization of the corresponding phenols. By group selectivity in the nucleophilic 1,4-addition/elimination reaction, highly stereoselective formation of the spiro center was successfully achieved. This reaction might provide access to total syntheses of (+)-bisdechlorogeodin and (+)-geodin with complete control of the formation of the spirocyclic structure.
通过相应
酚的氧化脱芳构化合成了具有
三异丙基甲
硅烷氧基的
环醚附属物的螺环 3,5-difluorocyclohexa-2,5-dionenes。通过亲核1,4-加成/消除反应中的基团选择性,成功实现了螺中心的高度立体选择性形成。该反应可能提供完全合成 (+)-bisdechlorogeodin 和 (+)-geodin 的途径,并完全控制螺环结构的形成。