Synthesis of Naturally Occurring Cyclohexene Rings Using Stereodirected Intramolecular Diels-Alder Reactions Through Asymmetric 1,3-Dioxane Tethering
作者:Hajer Abdelkafi、Laurent Evanno、Alexandre Deville、Lionel Dubost、Angèle Chiaroni、Bastien Nay
DOI:10.1002/ejoc.201001678
日期:2011.5
asymmetric 1,3-dioxane template in intramolecular Diels-Alder reactions is reported. The 1,3,9-decatrienoates substrates gave predominantly the endo-boat products, with minor amounts of the exo-boat isomer. Various substitutions (14 examples) were introduced and the results gave an indication of the scope and also a few limitations of the method. In particular, the approach was applicable to (E,Z)-diene
报告了容易获得的不对称 1,3-二恶烷模板在分子内 Diels-Alder 反应中的应用。1,3,9-十碳三烯酸酯底物主要产生内型船型产物,少量外型船型异构体。引入了各种替换(14 个示例),结果表明了该方法的范围和一些限制。特别是,该方法适用于 (E,Z)-二烯底物,获得了良好的产率和选择性。通过应用合适的底物,我们描述了用于全合成二萜三萜内酯 (1) 和吡咯烷聚酮化合物 (2) 的有价值中间体的成功合成,在高度官能化的环己烯环系统中提供了天然产物的适当立体化学。