Short Total Synthesis of (±)-Gelliusine E and 2,3′-Bis(indolyl)ethylamines <i>via</i> PTSA-Catalyzed Transindolylation
作者:Chayamon Chantana、Uthaiwan Sirion、Panata Iawsipo、Jaray Jaratjaroonphong
DOI:10.1021/acs.joc.1c01461
日期:2021.10.1
A first and short total synthesis of the marine sponge 2,3′-bis(indolyl)ethylamine (2,3′-BIEA) alkaloid (±)-gelliusine E was performed in both a three-step divergent approach and a one-pot three-component approach with an overall yield of up to 58%. A key feature of the novel strategy is PTSA-catalyzed transindolylation of the readily synthesized 3,3′-BIEAs with tryptamine derivatives. The structure
海绵2,3'-双(吲哚基)乙胺(2,3'-BIEA)生物碱(±)-凝胶E的第一次和短时间全合成以三步发散法和一锅法进行三组分方法,总收率高达 58%。新策略的一个关键特征是容易合成的 3,3'-BIEA 与色胺衍生物的 PTSA 催化转吲哚基化反应。分离的天然产物的结构被修改为质子化 (±)-geliusine E (4')。通过设计,这种模块化路线允许快速合成 2,3'-BIEA 家族的其他成员,例如 (±)-6,6'-双-(debromo)-geliusine F 和具有逐步经济性、可操作性的类似物简单,减少浪费。此外,研究了它们在乳腺癌细胞中的细胞毒性。