A formal synthesis of leustroducsin B, a potent antitumor compound, is described featuring two key reactions: an olefin cross-metathesis between α-methylene γ-butyrolactone and a terminal olefin to install the C7-C12 carbon backbone, and a highly stereoselective Brown-type pentenylation which sets the syn-relationship between the two substituents at C4 and C5.
本文描述了新型强效抗肿瘤化合物leustroducsin B的正式合成,其中两个关键反应分别是:通过α-亚甲基-
γ-丁内酯与末端烯烃之间的烯烃交叉歧化反应构建C7-C12碳骨架,以及高度立体选择性的布朗型
戊烯化反应,确定C4和C5位两个取代基之间的顺式关系。