cagelike core containing eight contiguous stereogenic centers (including three quaternary stereocenters) and several carbonyl functionalities. On the basis of its proposed biogenetic synthesis, we designed a total synthesis of homodimericin A that proceeds in seven steps and features a double Michael reaction, an intramolecular Diels–Alder reaction, and an ene reaction.
同二聚体A是一种显着的真菌代谢产物。这种高度氧化的外消旋不饱和聚酮化合物由于其空间要求严格的中心笼状核心(包含八个连续的立体中心(包括三个四级立体中心)和多个羰基官能团)而对合成提出了重大挑战。根据拟议的
生物遗传合成方法,我们设计了高聚二聚体A的总合成过程,该过程以七个步骤进行,并具有双重迈克尔反应,分子内Diels-Alder反应和烯键反应。