Oxidative Dearomatization of 4,5,6,7-Tetrahydro-1<i>H</i>-indoles Obtained by Metal- and Solvent-Free Thermal 5-<i>endo</i>-<i>dig</i>Cyclization: The Route to Erythrina and Lycorine Alkaloids
作者:Ivan A. Andreev、Nina K. Ratmanova、Anton M. Novoselov、Dmitry S. Belov、Irina F. Seregina、Alexander V. Kurkin
DOI:10.1002/chem.201600273
日期:2016.5.17
which greatly amplify the developed methodology. The utility of obtained indolones as unified key precursors is demonstrated by the application of these products to the formal total syntheses of a whole pleiad of Erythrina‐ and Lycorine‐type alkaloids, namely (±)‐erysotramidine, (±)‐erysotrine, (±)‐erythravine, (±)‐γ‐lycorane, and abnormal erythrinanes (±)‐coccoline and (±)‐coccuvinine.
基于热诱导金属和无溶剂-5-一种简便的一锅方法内切-挖环化氨基炔丙醇的与4,5,6,7-四氢吲哚的戴斯-马丁氧化剂-促进的脱芳构化氧化反应组合中间体提供了对5,6-二氢-1 H-吲哚-2(4 H)酮的有效而稳定的连接。合成序列的绿色,相对温和和操作简单的特征是主要优点,极大地放大了开发的方法。获得吲哚酮作为统一的关键前体的效用证明这些产品的昴星团整体的正式全合成中的应用刺桐-和石蒜类型的生物碱,即(±)-赤藓酰胺,(±)-赤藓碱,(±)-赤藓烷,(±)-γ-二十二烷和异常的赤藓酮(±)-cococoline和(±)-coccuvinine)。