The asymmetric total synthesis of (−)-virosaine A was achieved in 9% overall yield from commercially/readily available starting materials. Inspired by an intriguing biosynthetic proposal, a novel cascade reaction sequence was developed to efficiently construct the caged polycyclic core of virosaine A. The pivotal cascade precursor was readily available in enantiopure form via a robust route that featured an enantioselective one-pot Diels-Alder cycloaddition/organolithium addition. Several contemporary methods of CH functionalization were applied to the cascade product and yielded a diverse set of novel complex polycycles. Ultimately, a combination of NMR and computational analyses laid the groundwork for a successful directed lithiation strategy to selectively functionalize the caged core and complete the total synthesis of virosaine A.

（-）-virosaine A的不对称全合成是从市售/容易获得的起始原料中实现的，总产率为9％。受一个有趣的生物合成提议的启发，开发了一种新型的级联反应序列，以有效地构建virosaine A的笼状多环核心。关键的级联前体很容易通过对映纯形式通过对映选择性单锅Diels-Alder环加成的健壮途径获得。/ organolithium添加。C的几种当代方法H功能化应用于级联产物，并产生了多种多样的新型复杂多环化合物。最终，将NMR和计算分析相结合，为成功的定向锂化策略奠定了基础，该策略可选择性地使笼状核官能化并完成virosaine A的总合成。