作者:Eppakayala Sreedhar、Arramshetti Venkanna、Nagula Chandramouli、K. Suresh Babu、Janaswamy Madhusudana Rao
DOI:10.1002/ejoc.201001378
日期:2011.2
The first total synthesis of the cytotoxic oxylipin Topsentolide B3 has been accomplished in 15 steps with an overall yield of 24 %. Starting with readily available cis-butene diol as a synthon, the synthesis involved Marouka allylation and Sharpless hydroxylation for the construction of three asymmetric centers. The nine-membered lactone ring was built through a selective Grubbs ring-closing metathesis
细胞毒性 oxylipin Topsentolide B3 的首次全合成分 15 个步骤完成,总产率为 24%。从容易获得的顺丁烯二醇作为合成子开始,合成涉及 Marouka 烯丙基化和 Sharpless 羟基化以构建三个不对称中心。九元内酯环是通过选择性 Grubbs 闭环复分解反应构建的。合成中的其他关键步骤是 CuI 介导的炔基化和 Swern 氧化反应。这为氧脂素的合成提供了一种独特的方法,并提供了简洁和相对较高的总产率的优点。