projected series of bryostatin analogues has been accomplished in 26 steps and 2.2% overall yield. In this letter, we detail two approaches to the structural core of these tricyclic macrolactone bryostatin analogues. The key features of the route include BITIP-catalyzed asymmetric allylation reactions and Mukaiyama aldol reactions, a chelation-controlled allylation, pyran annulation reactions, and macrolactonization
[反应:请参见文字]。预计的一系列抑菌素类似物系列的第一个合成已完成26个步骤,总产率为2.2%。在这封信中,我们详细介绍了这些
三环大内酯bryostatin类似物的结构核心的两种方法。该路线的主要特征包括
BITIP催化的不对称烯丙基化反应和Mukaiyama醛醇缩合反应,螯合控制的烯丙基化,
吡喃环化反应和大环内酯化。