Short, Divergent, and Enantioselective Total Synthesis of Bioactive <i>ent</i>-Pimaranes
作者:Immanuel Plangger、Klaus Wurst、Thomas Magauer
DOI:10.1021/acs.orglett.2c02843
日期:2022.10.7
We present the first total synthesis of eight ent-pimaranes via a short and enantioselective route (11–16 steps). Key features of the divergent synthesis are a Sharpless asymmetric dihydroxylation, a Brønsted acidcatalyzed cationic bicyclization, and a mild Rh-catalyzed arene hydrogenation for rapid access to a late synthetic branching point. From there on, selective functional group manipulations
我们首次通过一条短的对映选择性路线(11-16 步)全合成了八种ent -pimarane。发散合成的主要特征是 Sharpless 不对称二羟基化、Brønsted 酸催化的阳离子双环化和温和的 Rh 催化的芳烃氢化以快速获得后期合成支化点。从那时起,选择性的官能团操作能够合成在 A 环和 C 环中带有不同修饰的ent -pimaranes。