Blue LED Mediated Intramolecular C–H Functionalization and Cyclopropanation of Tryptamines: Synthesis of Azepino[4, 5-b]indoles and Natural Product Inspired Polycyclic Indoles
作者:Jyoti Chauhan、Mahesh K. Ravva、Ludovic Gremaud、Subhabrata Sen
DOI:10.1021/acs.orglett.0c01559
日期:2020.6.5
functionalization of tryptamine derivatives to generate azepino[4, 5-b]indoles (4) in moderate to good yields. By altering the substitution at the tryptamine nitrogen, intramolecular cyclopropanation is achieved in high yields under the same reactions condition to provide natural product inspired polycyclic indoles (6), which are further transformed to spiropiperidino (5 and 8) indoles in decent yields. The
我们报告了一种新型的蓝色LED介导的色胺胺衍生物的分子内C–H功能化,以中等至良好的产率产生azepino [4,5-b]吲哚(4)。通过改变色胺在氮原子上的取代,在相同反应条件下以高收率实现分子内环丙烷化,以提供天然产物激发的多环吲哚(6),然后将其进一步转化为螺哌啶子基(5和8)吲哚,获得可观的收率。通过DFT研究研究了化合物的形成机理。