Sharpe Robert J, Johnson Jeffrey S
Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States.
J Org Chem. 2015 Oct 2;80(19):9740-66. doi: 10.1021/acs.joc.5b01844.
An enantioselective synthesis of the indole diterpenoid natural product paspaline is disclosed. Critical to this approach was the implementation of stereoselective desymmetrization reactions to assemble key stereocenters of the molecule. The design and execution of these tactics are described in detail, and a thorough analysis of observed outcomes is presented, ultimately providing the title compound in high stereopurity. This synthesis provides a novel template for preparing key stereocenters in this family of molecules, and the reactions developed en route to paspaline present a series of new synthetic disconnections in preparing steroidal natural products.
公开了一种对映选择性合成吲哚二萜类天然产物巴斯帕林的方法。该方法的关键在于实施立体选择性去对称化反应以构建分子的关键立体中心。详细描述了这些策略的设计和实施,并对观察到的结果进行了全面分析,最终以高立体纯度得到了目标化合物。该合成方法为制备这类分子中的关键立体中心提供了一种新的模板,并且在合成巴斯帕林的过程中所开发的反应为制备甾体天然产物提供了一系列新的合成切断方法。