cross-dehydrogenative coupling between quinoxalinones (sp2 C–H) and amines (N–H) in the presence of catalytic iodine is reported. The reaction yields 3-aminoquinoxalinones in moderate to high yields under ambient conditions in dioxane as solvent and aqueous tert-butyl hydroperoxide (TBHP) as the terminal oxidant. The reaction is highly versatile and exhibits good functional group tolerance with a range of primary
Copper catalyzed aerobic oxidative amination of 3,4-dihydroquinoxalin-2(1H)-ones
作者:Shuocheng Wan、Jie Wang、Congde Huo
DOI:10.1016/j.tetlet.2021.153271
日期:2021.8
3,4-dihydroquinoxalin-2(1H)-ones is developed. This protocol provides a concise method to access 3-aminoquinoxalinone derivatives with good functional-group tolerances, utilizing primary and secondary aliphatic amines as nitrogen sources under mild and simple reaction conditions. It provides a practical approach to the synthesis of pharmaceutical active 3-aminoquinoxalinones.
开发了铜催化的 3,4-dihydroquinoxalin-2(1H)-ones 的有氧 sp 3 C H 胺化。该协议提供了一种简洁的方法来获得具有良好官能团耐受性的 3-氨基喹喔啉酮衍生物,在温和和简单的反应条件下利用伯和仲脂肪胺作为氮源。它提供了一种合成药物活性 3-氨基喹喔啉酮的实用方法。
Electrochemical Dehydrogenative Cross-Coupling of Quinoxalin-2(1<i>H</i>
)-ones with Amines for the Synthesis of 3-Aminoquinoxalinones
作者:Ke-Jing Li、Kun Xu、Yong-Guo Liu、Cheng-Chu Zeng、Bao-Guo Sun
DOI:10.1002/adsc.201800989
日期:2019.3.5
An efficient protocol for the synthesis of 3‐aminoquinoxalinones via the electrochemical dehydrogenative C‐3 amination of quinoxalin‐2(1H)‐ones was developed. With aliphatic amines and azoles as the nitrogen sources, a series of 3‐aminoquinoxalinones was obtained in up to 99% yield. This direct electrolytic method avoids the use of transition metals and external oxidants, and represents an appealing