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。
Direct oxidative C H amination of quinoxalinones under copper-organic framework catalysis
作者:Thanh T. Hoang、Tuong A. To、Vi T.T. Cao、Anh T. Nguyen、Tung T. Nguyen、Nam T.S. Phan
DOI:10.1016/j.catcom.2017.07.012
日期:2017.11
amination of quinoxalin-2(1H)-ones with amines to produce 3-aminoquinoxalin-2(1H)-ones. High yields were achieved in the presence of molecular oxygen as the oxidant. This framework was more catalytically active than a number of MOF-based catalysts. The Cu-CPO-27 also displayed higher performance than CuFe2O4 nanoparticles. The copper-organic framework catalyst could be reutilized in the synthesis of 3-a
合成了铜-有机骨架Cu-CPO-27,并将其用作可再循环的多相催化剂,用于将quinoxalin-2(1 H)-与胺直接进行C H胺化反应,生成3-aminoquinoxalin-2(1 H)-那些。在分子氧作为氧化剂存在下实现了高收率。该框架比许多基于MOF的催化剂更具催化活性。Cu-CPO-27还显示出比CuFe 2 O 4纳米颗粒更高的性能。铜-有机骨架催化剂可通过直接C重复利用在3-氨基喹喔啉-2(1 H)-one的合成中氨化反应,催化性能没有明显降低。据我们所知,这是第一个生成3-aminoquinoxalin-2(1 H)-ones的非均相催化方案。