Iridium‐Catalyzed Annulation Reactions of Thiophenes with Carboxylic Acids: Direct Evidence for a Heck‐type Pathway
作者:Guangying Tan、Qiulin You、Jingbo Lan、Jingsong You
DOI:10.1002/anie.201802539
日期:2018.5.22
The functionalization of thiophenes is a fundamental and important reaction. Herein, we disclose iridium‐catalyzed one‐pot annulation reactions of (benzo)thiophenes with (hetero)aromatic or α,β‐unsaturated carboxylic acids, which afford thiophene‐fused coumarin‐type frameworks. Dearomatization reactions of 2‐substituted thiophenes with α,β‐unsaturated carboxylic acids deliver various thiophene‐containing
噻吩的功能化是一个基本而重要的反应。本文中,我们公开了铱催化的(苯并)噻吩与(杂)芳族或α,β-不饱和羧酸的单锅环化反应,这些反应提供了噻吩稠合的香豆素型骨架。2个取代的噻吩与α,β-不饱和羧酸的脱芳香化反应可提供各种含噻吩的螺环产物。两个相互关联的反应的发生为Heck型途径提供了直接的证据。的机械方案在此描述是从S明显不同È Ar和在充分描述的氧化C-H / C-H的交叉耦合与其它杂芳烃噻吩的反应中遇到的金属化一致-protodemetalation(CMD)途径。