A green synthesis strategy of 2-arylquinoxalines and 3-arylquinoxalin-2(1H)-ones via ball milling, which could avoid copious solvent waste, was accomplished in this work. Aryl radicals were produced from aryldiazoniumsalts by using a solvent-free or catalyst-free single electron transfer process induced by mechanical force, affording a series of 2-arylquinoxalines and 3-arylquinoxalin-2(1H)-ones with
本工作通过球磨实现了一种避免大量溶剂浪费的2-芳基喹喔啉和3-芳基喹喔啉-2(1 H )-酮的绿色合成策略。通过使用由机械力诱导的无溶剂或无催化剂的单电子转移过程从芳基重氮盐产生芳基自由基,得到一系列 2-arylquinoxaline 和 3-arylquinoxalin-2(1 H )-ones,其含量为 28%–85屈服。
Visible Light Photoredox-Catalyzed Direct C–H Arylation of Quinoxalin-2(1<i>H</i>)-ones with Diaryliodonium Salts
作者:Raj K. Samanta、Prahallad Meher、Sandip Murarka
DOI:10.1021/acs.joc.2c01234
日期:2022.8.19
photoredox-catalyzed direct arylation of quinoxalin-2-(1H)-ones using diaryliodonium triflates as the convenient, stable, and cheap aryl source is described. A broad variety of quinoxalin-2-(1H)-ones are shown to react with structurally and electronically diverse diaryliodonium triflates, allowing efficient access to a wide variety of pharmaceutically important 3-arylquinoxalin-2-(1H)-ones. The presented method
描述了使用二芳基碘鎓三氟甲磺酸盐作为方便、稳定和廉价的芳基来源的 quinoxalin-2-(1 H )-ones 的光氧化还原催化直接芳基化。多种 quinoxalin-2-(1 H )-ones 可与结构和电子不同的二芳基碘鎓三氟甲磺酸盐反应,从而可以有效地获得多种药学上重要的 3-arylquinoxalin-2-(1 H )-ones。所提出的方法在操作简单、条件温和、范围广、可扩展性和高官能团耐受性方面具有吸引力。