Solvent-Controlled Bifurcated Cascade Process for the Selective Preparation of Dihydrocarbazoles or Dihydropyridoindoles
作者:Dong-Liang Mo、Donald J. Wink、Laura L. Anderson
DOI:10.1002/chem.201403268
日期:2014.10.6
A solvent‐controlled cascade process has been identified for the dual purpose of the preparation of either dihydrocarbazoles or dihydropyridoindoles from identical N‐aryl‐α,β‐unsaturated nitrones and electron‐deficient allene starting materials. These reactions proceed smoothly under mild metal‐free conditions affording a range of two types of skeletally distinct indole‐based heterocycles in high yield
已经确定了一种溶剂控制的级联工艺,可用于从相同的N-芳基-α,β-不饱和硝酮和缺电子的丙二烯起始原料制备二氢咔唑或二氢吡啶并吲哚的双重目的。这些反应在无金属的温和条件下可以顺利进行,从而提供了两种类型的骨架不同的吲哚基杂环化合物,具有高收率和非对映选择性。这些转化表明使用了分叉的级联过程,该过程取决于苯并ze庚因中间体的开环事件,以合成骨架多样的杂环产物,并快速获得具有生物学意义的,基于吲哚的结构。