Synthesis of diverse nitrogen fused polycyclic dihydroisoquinoline (DHIQ) derivatives via GBB-based cyclic iminium induced double-annulation cascade
作者:Sandip Gangadhar Balwe、Sandip S. Vagh、Yeon Tae Jeong
DOI:10.1016/j.tetlet.2020.152101
日期:2020.7
for the synthesis of novel dihydroindazolo[3′,2′:2,3]imidazo[5,1-a]isoquinolinamines has been achieved through the three-component Groebke–Blackburn–Bienayme reaction. The transformation is based on sequential cascade processes involving imine formation followed by an intramolecular nucleophilic substitution to generate a highly reactive cyclic iminium species, which would undergo a rapid [4 + 1] formal
通过合成实现了一种高效且独特的布朗斯台德酸介导的空前的环状亚胺诱导的双环级联反应(DAC)方案,用于合成新型二氢吲哚并[3',2':2,3]咪唑并[5,1- a ]异喹啉胺三组分Groebke–Blackburn–Bienayme反应。该转化基于顺序的级联过程,该过程涉及形成亚胺,然后进行分子内亲核取代,以生成高反应性的环亚胺,这些亚胺将以一锅方式快速[4 +1]正式的环加成步骤。通过采用容易获得的底物和简单的方法,该策略提供了新颖的骨架多样的复杂的氮稠合多环DHIQ衍生物,这将使该方法在有机合成中潜在有用。