Stereoselective rearrangement of a free or metal‐bound oxonium ylide, generated by rhodium‐catalyzed intramolecular cyclization of the diazo ketone 1, afforded E‐configured O‐bridged bicyclic ether (E)‐2, which was efficiently transformed into (−)‐cladiella‐6,11‐dien‐3‐ol. TBS=tert‐butyldimethylsilyl.
铑催化重
氮酮1的分子内环化反应生成的游离或与
金属结合的叶立德叶立德的立体选择性重排,提供了E构型的O桥联双
环醚(E)-2,可将其有效转化为(-)-cladiella ‐6,11‐dien‐3‐ol。TBS =叔丁基二甲基甲
硅烷基。