Iodine mediated intramolecular C2-amidative cyclization of indoles: a facile access to indole fused tetracycles
作者:Sindhura Badigenchala、Venkatachalam Rajeshkumar、Govindasamy Sekar
DOI:10.1039/c5ob02449h
日期:——
amidation of indoles under mild reaction conditions is developed. This methodology affords various indole fused tetracyclic compounds, such as benzo[4,5]imidazo[1,2-a]indoles by intramolecular C2 amidation of N-aryl substituted indoles. This C2 sulfonamidative cyclization also offers convenient access to indolo[2,3-b]indoles and dihydroindolo[2,3-b]quinoline from C3 aryl substituted indoles in good to excellent
在温和的反应条件下,开发了一种新颖且无金属的I 2介导的吲哚分子内C2酰胺化反应。该方法通过N-芳基取代的吲哚的分子内C 2酰胺化而得到各种吲哚稠合的四环化合物,例如苯并[4,5]咪唑并[1,2- a ]吲哚。这种C2磺酰胺化环化反应还可以方便地从C3芳基取代的吲哚获得吲哚[2,3- b ]吲哚和二氢吲哚[2,3- b ]喹啉,收率良好。吲哚[2,3- b ]喹啉还可以通过多米诺环化-脱甲苯磺酸化-芳香化反应序列合成。