有机化学 ›› 2023, Vol. 43 ›› Issue (2): 697-704.DOI: 10.6023/cjoc202207031 上一篇    下一篇

研究论文

可见光诱导下喹喔啉酮与吡咯衍生物的氧化偶联

沈梦涵a, 李来强a, 周泉a,*(), 王洁慧a, 王磊a,b,*()   

  1. a 台州学院高等研究院和药学院 浙江台州 318000
    b 中国科学院上海有机化学研究所 金属有机化学国家重点实验室 上海 200032
  • 收稿日期:2022-07-25 修回日期:2022-09-15 发布日期:2022-10-24
  • 基金资助:
    浙江省自然科学基金(LZ22B020003); 国家自然科学基金(22071171)

Visible-Light-Induced Regio-selective Oxidative Coupling of Quinoxalinones with Pyrrole Derivatives

Menghan Shena, Laiqiang Lia, Quan Zhoua(), Jiehui Wanga, Lei Wanga,b()   

  1. a Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Taizhou, Zhejiang 318000
    b State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032
  • Received:2022-07-25 Revised:2022-09-15 Published:2022-10-24
  • Contact: *E-mail: leiwang@chnu.edu.cn;qzhou@tzc.edu.cn
  • Supported by:
    Natural Science Foundation of Zhejiang Province(LZ22B020003); National Natural Science Foundation of China(22071171)

发展了一种区域选择性的喹喔啉酮3-位氧化偶联富电子吡咯衍生物的方法. 以$\text{Mes-Acr-M}{{\text{e}}^{\text{+}}}\text{ClO}_{\text{4}}^{-}$(3 mol%)为光敏剂, 空气氧为氧化剂, 高收率得到喹喔酮与吡咯衍生物的氧化偶联产物. 该方法底物的官能团适用范围广, 反应高效绿色, 可快速构建基于喹喔啉酮-吡咯衍生物的药物分子库. 相同测试条件下的Stern-Volmer荧光淬灭实验表明, 缺电子芳烃1-甲基喹喔啉酮对光敏剂的淬灭速率常数Kq=1.2×109 L•mol-1•s-1, 而富电子芳烃1-甲基吡咯/1-甲基吲哚的淬灭常数约为1.06~1.07×1010 L•mol-1•s-1, 后者的荧光淬灭速率几乎是前者的10倍.

关键词: 氧化偶联, 喹喔啉酮, 光催化, 区域选择性

Herein, one feasible methodology has been developed for oxidative cross-coupling between quinoxalinones and electron-rich aromatic rings (pyrroles or indoles). Utilizing the commerial available photocatalyst $\text{Mes-Acr-M}{{\text{e}}^{\text{+}}}\text{ClO}_{\text{4}}^{-}$ (3 mol%) as catalyst and air as external oxidant, the oxidative coupling products of quinolones and pyrrole derivatives were obtained in high yields. The protocol provides effective acceess to such quinoxalinones-pyrrole derivatives with profiles of broad functional group, efficient conversion and easy-handling. Furthermore, Stern-Volmer fluorescent quenching experiments under the same condition disclosed that quenching rate constant of electron-rich aromatic ring (pyrrole or indole, kq 1.06×1010~1.07×1010 L•mol-1•s-1) was nearly one order of magnitude larger than that of electro-deficient quinoxalinones (kq=1.2×109 L•mol-1•s-1).

Key words: oxidative cross-coupling reaction, quinoxalinone, photocatalysis, regio-selectivity