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.
Concise Total Synthesis of (±)-<i>cis</i>-Trikentrin A and (±)-Herbindole A via Intermolecular Indole Aryne Cycloaddition
作者:Keith R. Buszek、Neil Brown、Diheng Luo
DOI:10.1021/ol802425m
日期:2009.1.1
An efficient nine-step totalsynthesis of the annulated indole natural products (±)-cis-trikentrin A and (±)-herbindole A was accomplished via an intermolecular Diels−Alder cycloaddition using our recently developed indole aryne (indolyne) methodology as the key step. This strategy provides rapid access into the trikentrins and the related herbindoles and represents the first application of this methodology
Total Synthesis of (±)-Herbindole A, (±)-Herbindole B, and (±)-<i>cis</i>-Trikentrin A
作者:Stephen K. Jackson、Michael A. Kerr
DOI:10.1021/jo062350v
日期:2007.2.1
[GRAPHIC]Herein we describe a divergent total synthesis of the title compounds utilizing Diels-Alder reactions of monoimine quinoids, followed by cyclization of the aromatized adducts to generate the tricyclic skeletons. Elaboration to iodinated or triflated indole derivatives allows for installation of the requisite alkyl substitution via cross-coupling reactions.