Diastereoselective one-pot Wittig olefination–Michael addition and olefin cross metathesis strategy for total synthesis of cytotoxic natural product (+)-varitriol and its higher analogues
作者:Partha Ghosal、Deepty Sharma、Brijesh Kumar、Sanjeev Meena、Sudhir Sinha、Arun K. Shaw
DOI:10.1039/c1ob06039b
日期:——
A stereoselective route for the total synthesis of anticancer marine natural product (+)-varitriol (1) is detailed herein. The impressive biological activity and interesting structural features of natural (+)-varitriol fuelled us to undertake the synthesis of some higher analogues (1a–j) of this molecule. The key features of the synthetic strategy include one-pot Wittig olefination followed by a highly
全合成抗癌海洋天然产物的立体选择途径 (+)-曲三醇(1)在本文中详细描述。天然的令人印象深刻的生物活性和有趣的结构特征(+)-曲三醇促使我们进行了该分子的一些高级类似物(1a–j)的合成。合成策略的关键特征包括一锅法Wittig烯烃化反应,然后进行高度非对映选择性的oxa-Michael加成反应,以组装天然varitriol的立体化学纯的四取代THF部分和烯烃交叉易位,从而使芳族部分与四取代的THF部分偶联。从9个线性步骤开始,标题天然产物的总合成非常有效,总产率为21.8%D-核糖因此也为合成1及其类似物提供了更大规模的实用途径。合成的(+)-曲三醇(1)及其类似物的细胞毒性被筛选。本合成方法为制备用于药物开发的标题天然产物的许多类似物铺平了道路。