Metal-Free Photosynthesis of Alkylated Benzimidazo[2,1-<i>a</i>]isoquinoline-6(5<i>H</i>)-ones and Indolo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-ones in PEG-200
A visible-light-induced decarboxylation reaction was developed for the synthesis of alkylated benzimidazo[2,1-a]isoquinoline-6(5H)-ones and indolo[2,1-a]isoquinolin-6(5H)-ones under metal-free conditions. Impressively, metal catalysts and traditionally volatile organic solvents could be effectively avoided.
A decarboxylative radical addition/cyclization strategy was developed, by which a wide range of benzimidazo[2,1-a]isoquinoline-6(5H)-ones were prepared via reaction of 2-arylbenzoimidazoles and carboxylic acids.
Mn-Catalyzed Electrochemical Radical Cascade Cyclization toward the Synthesis of Benzo[4,5]imidazo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-one Derivatives
作者:Yong Yuan、Yongfu Zheng、Bizhen Xu、Jiapeng Liao、Faxiang Bu、Shengchun Wang、Jian-Guo Hu、Aiwen Lei
DOI:10.1021/acscatal.0c01324
日期:2020.6.19
Benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-one derivatives are prevalent in many synthetic intermediates, pharmaceuticals, and organic materials. Herein, we develop a Mn-catalyzed electrochemical radical cascade cyclization reaction that uses electricity as the primary energy input to promote the reaction, leading to a series of benzo[4,5]imidazo[2,1-a]isoquinolin-6(5H)-one derivatives under exogenous-oxidant-free
苯并[4,5]咪唑并[2,1 - a ]异喹啉-6(5 H)-one衍生物在许多合成中间体,药物和有机材料中很普遍。本文中,我们开发了一种锰催化的电化学自由基级联环化反应,该反应使用电作为主要能量输入来促进反应,从而产生一系列苯并[4,5]咪唑并[2,1 - a ]异喹啉-6(5在无外源氧化剂的条件下,H)-一衍生物。值得注意的是,该电化学方法不仅可以实现苯并[4,5]咪唑并[2,1 - a ]异喹啉-6(5 H)-one衍生物的合成,而且提供了一种新的由烷基生成烷基的策略。烷基硼酸。
Molecular Oxygen‐Mediated Radical Cyclization of Acrylamides with Boronic Acids
作者:Changduo Pan、Cheng Yuan、Jin‐Tao Yu
DOI:10.1002/adsc.202100853
日期:2021.11.9
A radical alkylarylation of 2-aryl-N-methacryloyl indoles via autoxidation of alkylboronic acids was developed under metal-free conditions for the construction of indolo[2,1-a]isoquinolinone derivatives. Primary and secondary alkyl boronic acids were utilized as suitable alkyl sources with O2 as the clean and green oxidant in a simple operate mode. Moreover, this protocol can also be applied to the
2-芳基-N-甲基丙烯酰基吲哚通过烷基硼酸的自氧化反应,在无金属条件下进行了自由基烷基芳基化,以构建吲哚并[2,1- a ]异喹啉酮衍生物。伯和仲烷基硼酸被用作合适的烷基来源,O 2作为清洁和绿色氧化剂,以简单的操作模式。此外,该协议还可以应用于苯并咪唑-[2,1- a ]异喹啉酮衍生物的构建。