Syntheses of the <i>Stemona</i> Alkaloids (±)-Stenine, (±)-Neostenine, and (±)-13-Epineostenine Using a Stereodivergent Diels–Alder/Azido-Schmidt Reaction
作者:Kevin J. Frankowski、Jennifer E. Golden、Yibin Zeng、Yao Lei、Jeffrey Aubé
DOI:10.1021/ja800574m
日期:2008.5.1
A tandem Diels-Alder/azido-Schmidt reaction sequence provides rapid access to the core skeleton shared by several Stemona alkaloids including stenine, neostenine, tuberostemonine, and neotuberostemonine. The discovery and evolution of inter- and intramolecular variations of this process and their applications to total syntheses of (+/-)-stenine and (+/-)-neostenine are described. The stereochemical
串联 Diels-Alder/叠氮基-Schmidt 反应序列提供了对包括 Stemona 生物碱(包括 Stemona 生物碱,包括 stemona、neostenine、tuberostemonine 和 neotuberostemonine)共有的核心骨架的快速访问。描述了该过程的分子间和分子内变异的发现和演变及其在 (+/-)-stenine 和 (+/-)-neostenine 全合成中的应用。反应的立体化学结果取决于底物类型和反应条件,从而能够从相同的二烯/亲二烯体组合中制备 (+/-)-stenine 和 (+/-)-neostenine。