Total Synthesis of (−)-Herbindoles A, B, and C via Transition-Metal-Catalyzed Intramolecular [2 + 2 + 2] Cyclization between Ynamide and Diynes
作者:Nozomi Saito、Taisuke Ichimaru、Yoshihiro Sato
DOI:10.1021/ol300571b
日期:2012.4.6
The total syntheses of (−)-herbindoles A, B, and C as naturally occurring forms were accomplished for the first time through transition-metal-catalyzed intramolecular [2 + 2 + 2] cyclization between ynamide and diynes. This strategy provided a highly efficient synthetic route to all three herbindoles from an identical indoline derivative as a common intermediate.
(-)-herbindoles A,B和C作为天然形式的总合成是通过在酰胺和二炔之间的过渡金属催化的分子内[2 + 2 + 2]环化作用首次完成的。该策略提供了从相同的吲哚啉衍生物作为共同中间体到所有三个除草吲哚的高效合成途径。