Amide Synthesis by Nickel/Photoredox‐Catalyzed Direct Carbamoylation of (Hetero)Aryl Bromides
作者:Nurtalya Alandini、Luca Buzzetti、Gianfranco Favi、Tim Schulte、Lisa Candish、Karl D. Collins、Paolo Melchiorre
DOI:10.1002/anie.202000224
日期:2020.3.23
Herein, we report a one‐electron strategy for catalytic amide synthesis that enables the direct carbamoylation of (hetero)aryl bromides. This radical cross‐coupling approach, which is based on the combination of nickel and photoredox catalysis, proceeds at ambient temperature and uses readily available dihydropyridines as precursors of carbamoyl radicals. The method's mild reaction conditions make
在本文中,我们报告了一种催化酰胺合成的单电子策略,该策略可实现(杂)芳基溴化物的直接氨基甲酰基化。这种自由基交叉偶联方法基于镍和光氧化还原催化的结合,在环境温度下进行,并使用现成的二氢吡啶作为氨基甲酰基自由基的前体。该方法温和的反应条件使其能够耐受敏感的官能团底物,并允许在生物学相关的杂环中安装酰胺支架。此外,我们安装了带有电子贫乏和空间受阻胺部分的酰胺官能团,而这是用传统的脱水缩合方法难以制备的。