to their synthesis is therefore important. We have achieved the first totalsynthesis of squafosacin F and assigned its absoluteconfiguration. The key steps were an acid-mediated tandem intramolecular double cyclization to build the hydroxy-flanked mono-tetrahydrofuran core and decoration with the desired functionalities of the target natural product via highly stereoselective reactions.
番荔枝素具有广泛的潜在生物活性。因此,开发简单且面向多样性的合成方法非常重要。我们已经实现了 squafosacin F 的首次全合成并确定了它的绝对构型。关键步骤是酸介导的串联分子内双环化,以构建羟基侧翼的单四氢呋喃核心,并通过高度立体选择性反应以目标天然产物的所需功能进行装饰。
A Model Study towards a Conceptually New Synthetic Entry into the Seco- and Heteroyohimbine Alkaloid Families
作者:Thomas Vogelsang、Hans-Jürg Borschberg
DOI:10.1002/hlca.200390303
日期:2003.11
A model study is presented that paves the way to a new and flexible synthetic approach towards the seco- and heteroyohimbinealkaloid class. The key step involves a highly diastereoselective Cope rearrangement of an (E,E)-azacyclodeca-3,7-diene grafted onto a 3-ethylindole moiety to furnish a trans-3,4-divinylpiperidine derivative in 83% yield.