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。
Mechanically induced transition metal free C(sp)-H arylation of quinoxalin(on)es with diaryliodonium salts and piezoelectric BaTiO3
作者:Jun Jiang、Shengjie Song、JingJing Guo、Jiadi Zhou、Jianjun Li
DOI:10.1016/j.tetlet.2022.153820
日期:2022.5
A transition metalfree mechanically induced C(sp2)-H arylation of quinoxalin(on)es is described. In this study, diaryliodoniumsalts generate aryl radical by planetary ball milling, with the assist of piezoelectric material BaTiO3. A broad range of functional groups are tolerated to give products in moderate to good yields via radical mechanism.
Electrochemical Oxidative C–H Arylation of Quinoxalin(on)es with Arylhydrazine Hydrochlorides under Mild Conditions
作者:Shengjie Song、Xiangjun Shi、Yunsheng Zhu、Quanlei Ren、Peng Zhou、Jiadi Zhou、Jianjun Li
DOI:10.1021/acs.joc.2c00043
日期:2022.4.1
Iron-catalyzed Cross-Coupling of Electron-Deficient Heterocycles and Quinone with Organoboron Species via Innate C–H Functionalization: Application in Total Synthesis of Pyrazine Alkaloid Botryllazine A
作者:Parvinder Pal Singh、Sravan Kumar Aithagani、Mahipal Yadav、Varun Pratap Singh、Ram A. Vishwakarma
DOI:10.1021/jo302797r
日期:2013.3.15
innate C–H functionalization. Iron(II) acetylacetonate along with oxidant (K2S2O8) and phase-transfer catalyst (TBAB) under open flask conditions efficiently catalyzed the cross-coupling of pyrazine with arylboronicacids and gave monoarylated products in good to excellent yields. Optimized conditions also worked for other heterocylces such as quinoxalines, pyridines, quinoline, and isoquinoline as