Ascorbic Acid as an Aryl Radical Inducer in the Gold‐Mediated Arylation of Indoles with Aryldiazonium Chlorides
作者:Ignacio Medina‐Mercado、Eric Omar Asomoza‐Solís、Eduardo Martínez‐González、Victor Manuel Ugalde‐Saldívar、Lydia Gabriela Ledesma‐Olvera、José Enrique Barquera‐Lozada、Virginia Gómez‐Vidales、Joaquín Barroso‐Flores、Bernardo A. Frontana‐Uribe、Susana Porcel
DOI:10.1002/chem.201904413
日期:2020.1.13
the development of protocols that facilitate the oxidative addition of gold to access mild cross-coupling processes mediated by this metal has increased. In this context, we report herein that ascorbic acid, a natural and readily accessible antioxidant, can be used to accelerate the oxidative addition of aryldiazonium chlorides onto AuI . The aryl-AuIII species generated in this way, has been used
近年来,对促进金的氧化添加以进入由该金属介导的温和的交叉偶联过程的方案的兴趣增加了。在此背景下,我们在本文中报道抗坏血酸是一种天然且易于获得的抗氧化剂,可用于加速芳基重氮氯化物到AuI上的氧化加成。以这种方式产生的芳基-AuIII物种已被用于以一锅法从苯胺和对位,间位和邻位取代的芳基重氮鎓氯化物制备3-芳基吲哚。基于EPR分析,循环伏安法和DFT计算,详细研究了氧化加成的潜在机理。有趣的是,我们发现在该方案中,氯化物原子诱导了AuII / AuIII氧化步骤。