Total synthesis of (−)-cleistenolide and formal synthesis of herbarumin I via a diastereoselective modulable allylation
作者:Pol Karier、Gheorghe C. Catrinescu、Nicolas Diercxsens、Koen Robeyns、Michael L. Singleton、István E. Markó
DOI:10.1016/j.tet.2018.10.063
日期:2018.12
A modulable tin based allylation method for the synthesis of 1,2,3-triols is described. The optimization of the reaction was aided by 1H and 119Sn low temperature NMR spectroscopic investigations, which support the formation of two cyclic intermediates after transmetallation. Depending on the nature of the Lewis acid, either syn/anti or anti/syn configured triols could be obtained with good stereocontrol
描述了一种用于合成1,2,3-三醇的可调节的基于锡的烯丙基化方法。1 H和119 Sn低温NMR光谱研究有助于反应的优化,这支持在金属转移后形成两个环状中间体。取决于路易斯酸的性质,可以在良好的立体控制下获得顺式/反式或反式/顺式构型的三醇。为了证明这种方法和所产生的支架的价值,它们被用于安装(-)-香豆素内酯和植物标本I的标志性三醇基序。