有机化学 ›› 2022, Vol. 42 ›› Issue (12): 4315-4322.DOI: 10.6023/cjoc202209013 上一篇    下一篇

所属专题: 自由基化学专辑

研究论文

可见光介导喹喔啉-2(1H)-酮C3-H缩醛化反应

张孟琪a, 南光明a,*(), 赵晓辉b, 魏伟c,*()   

  1. a 伊犁师范大学化学与环境科学学院 新疆普通高等学校天然产物化学与应用重点实验室 新疆伊宁 835000
    b 中国科学院西北高原生物研究所 中国科学院藏药研究重点实验室 西宁 810008
    c 曲阜师范大学化学与化工学院 山东曲阜 273165
  • 收稿日期:2022-09-11 修回日期:2022-10-03 发布日期:2022-10-24
  • 通讯作者: 南光明, 魏伟
  • 基金资助:
    新疆普通高等学校天然产物化学与应用重点实验室基金(2022YSHXZD01)

Visible-Light-Mediated C3-H Acetalation of Quinoxalin-2(1H)-ones

Mengqi Zhanga, Guangming Nana(), Xiaohui Zhaob, Wei Weic()   

  1. a University and College Key Laboratory of Natural Product Chemistry and Application in Xinjiang, School of Chemistry and Environmental Science, Yili Normal University, Yining, Xinjiang 835000
    b CAS Key Laboratory of Tibetan Medicine Research, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Xining 810008
    c School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165
  • Received:2022-09-11 Revised:2022-10-03 Published:2022-10-24
  • Contact: Guangming Nan, Wei Wei
  • Supported by:
    Foundation of University and College Key Laboratory of Natural Product Chemistry and Application in Xinjiang(2022YSHXZD01)

报道了一种可见光介导1,2,3,5-四(咔唑-9-基)-4,6-二氰基苯(4CzIPN)催化喹喔啉-2(1H)-酮与乙缩醛酸的C3-H脱羧乙缩醛反应合成3-乙缩醛基喹喔啉-2(1H)-酮的方法. 该反应采用空气为氧化剂, 在室温下实现了一系列3-乙缩醛基喹喔啉-2(1H)-酮的绿色构建, 反应具有能源清洁、条件温和、非金属参与和氧化剂绿色等优点. 自由基捕捉实验和荧光猝灭实验表明, 该反应涉及光诱导自由基反应历程.

关键词: 可见光, 喹喔啉-2(1H)-酮, 脱羧缩醛化, 自由基反应

Visible-light-mediated 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) catalyzed decarboxylic acetalation of quinoxalin-2(1H)-ones with glyoxylic acid acetalde to access 3-acetal quinoxalin-2(1H)-ones has been reported. This reaction provides a green and efficient approach to construct a series of 3-acetal quinoxalin-2(1H)-ones by using of air as the oxidant at room temperature, which has the advantages of clean source of energy, mild conditions, metal-free and green oxidant. Radical trapping experiment and fluorescence quenching experiments showed that visible-light promoted radical reaction process was involved in this reaction system.

Key words: visible-light, quinoxalin-2(1H)-ones, decarboxylic acetalation, radical reaction