An Expedient Synthesis of Pyrrolo[3,2,1-<i>ij</i>]quinoline-1,2-diones via Intramolecular Friedel-Crafts Cyclization Protocol
作者:Hye Ran Moon、Su Yeon Kim、Jin Woo Lim、Jae Nyoung Kim
DOI:10.1002/bkcs.10539
日期:2015.11
The pyrrolo[3,2,1-ij]quinolines and their reduced or oxidized derivatives have received much attention due to their diverse biological functions including analgesic, anti-inflammatory, anti-epileptic, and anticancer activities. In spite of the broad applicability and rising interest from synthetic chemists, the reported methods for the preparation of pyrrolo[3,2,1-ij] quinolines are rather scarce.
吡咯并[3,2,1-ij]喹啉及其还原或氧化衍生物由于具有镇痛、抗炎、抗癫痫和抗癌等多种生物学功能而备受关注。尽管合成化学家具有广泛的适用性和日益增长的兴趣,但已报道的制备吡咯并[3,2,1-ij]喹啉的方法相当稀缺。最近,Skropeta 及其同事报道了通过钯催化的 7溴-N-取代靛红的 C7-N 环化合成吡咯并[3,2,1-ij]喹啉1,2-二酮(方案 1,方程式 1)。然而,产量非常低(8-39%)。法国等人。报道了通过 In(OTf )3 介导的分子内 Friedel-Crafts (IMFC) 方法合成 pyrrolo[3,2,1-ij]quinolin-4-ones(方案 1,方程式 2)。在我们最近对 IMFC 反应和靛红衍生物的化学转化感兴趣期间,我们推断吡咯并[3,2,1-ij]喹啉-1,2-二酮可以通过如方案 1 所示的 IMFC 方法制备(方程式. (3))。我们预计