Silver-catalyzed Double Decarboxylative Radical Alkynylation/Annulation of Arylpropiolic Acids with α-keto Acids: Access to Ynones and Flavones under Mild Conditions
作者:Mengting Meng、Guofang Wang、Liangfeng Yang、Kai Cheng、Chenze Qi
DOI:10.1002/adsc.201701469
日期:2018.3.20
Ynones are privileged building blocks in various organic syntheses of heterocyclic derivatives due to their multifunctional nature, and flavones are an important class of natural products with a wide range of biological activities. We describe the catalytic double decarboxylative alkynylation of arylpropiolic acids with α‐keto acids. With Ag(I)/persulfate as the catalysis system, the valuable ynones
壬烷由于其多功能性而成为杂环衍生物的各种有机合成中的重要组成部分,而黄酮是具有广泛生物活性的重要一类天然产物。我们描述了芳基丙酸与α-酮酸的催化双脱羧炔基化反应。以Ag(I)/过硫酸盐为催化体系,可以容易地获得带有各种取代基的有价值的炔酮。邻位羟基取代基的引入α-酮酸的位点使该策略进一步适用于通过异环戊烷以类似的银催化体系以中等到良好的收率构建黄酮衍生物。反应在相对温和的反应条件下进行,并能耐受多种官能团。对照实验表明,两个反应均经历自由基过程。