caribenols A and B, were accessed from a common building block. Our synthesis of caribenol A features the diastereoselective formation of the seven-membered ring through a Friedel-Crafts triflation and a late-stage oxidation of a furan ring. The first synthesis of caribenol B was achieved using an intramolecular organocatalytic α-arylation. An unusual intramolecular aldol addition was developed for the
两种复杂的norditerpenoids,caribenols A和B,是从一个共同的构建块获得的。我们合成 caribenol A 的特点是通过 Friedel-Crafts
三氟甲磺酸反应和
呋喃环的后期氧化非对映选择性地形成七元环。caribenol B 的首次合成是使用分子内有机催化 α-芳基化实现的。一种不寻常的分子内醛醇加成被开发用于组装其
环戊烯酮部分,而具有挑战性的反式二醇部分是通过选择性亲核加成到羟基 1,2-二酮来安装的。我们的整体合成策略也导致了两性内酯的第二代合成,证实了
呋喃作为强大的亲核试剂和多功能合成子的有用性。