在此,我们讨论了与蓝色 LED 介导的吲哚和相关杂环中 CH 和 NH 插入反应相关的项目,其中芳基重氮酯和碘鎓叶立德作为卡宾来源。蓝色 LED 有效地促进了这些转换,并从众多其他 LED 灯的选项中进行了优化。不需要金属催化剂。该反应形成不同烷基化的吲哚、吡咯和呋喃。使用对照实验和DFT计算来了解反应机理。作为应用化合物,由烷基化产物合成了带有氮杂[4, 5-b]吲哚和螺哌啶基吲哚结构单元的化合物。
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