Preparation of Novel Unsymmetrical Bisindoles under Solvent-Free Conditions: Synthesis, Crystal Structures, and Mechanistic Aspects
作者:Hanns Martin Kaiser、Ivo Zenz、Wei Fun Lo、Anke Spannenberg、Kristin Schröder、Haijun Jiao、Dirk Gördes、Matthias Beller、Man Kin Tse
DOI:10.1021/jo7016026
日期:2007.11.1
O-nucleophiles demonstrate their versatility as key intermediates in diversity oriented synthesis. The hydroxyl precursor leads also to unsymmetrical bisindoles under similar reaction conditions. Important intermediates and final library compounds were confirmed by X-ray analysis. Theoretical studies on these systems show the possible cationic intermediate in the substitution pathway.
吲哚氮丙啶及其羟基衍生物已用于制备新型官能化双吲哚的小型文库。在温和的反应条件下,通过无溶剂的C-C键在固体支持物上形成这些结构单元的多样化,产生了环状的Hymenialdisine类似物。作为C-亲核试剂的吲哚通过亲电子芳族取代途径以良好或优异的收率形成潜在的药理活性双吲哚。H-,N-和O进一步转化吲哚氮丙啶-亲核试剂证明了其作为多样性导向合成中的关键中间体的多功能性。羟基前体在相似的反应条件下也导致不对称的双吲哚。通过X射线分析证实了重要的中间体和最终的文库化合物。对这些系统的理论研究表明,取代途径中可能存在阳离子中间体。