有机化学 ›› 2021, Vol. 41 ›› Issue (12): 4789-4797.DOI: 10.6023/cjoc202107033 上一篇    下一篇

所属专题: 绿色合成化学专辑 热点论文虚拟合集

研究论文

溶剂介导吡咯并[1,2-a]喹喔啉选择性C—H键碘代

刘亚丽, 杨振, 李阳, 刘岩*(), 刘平*()   

  1. 石河子大学化学化工学院 化工绿色过程兵团重点实验室 新疆石河子 832003
  • 收稿日期:2021-07-15 修回日期:2021-08-20 发布日期:2021-09-02
  • 通讯作者: 刘岩, 刘平
  • 基金资助:
    国家自然科学基金(21563025); 国家自然科学基金(22162022)

Solvent Mediated Selective C—H Bond Iodination of Pyrrolo[1,2-a]quinoxaline

Yali Liu, Zhen Yang, Yang Li, Yan Liu(), Ping Liu()   

  1. Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi, Xinjiang 832003
  • Received:2021-07-15 Revised:2021-08-20 Published:2021-09-02
  • Contact: Yan Liu, Ping Liu
  • Supported by:
    National Natural Science Foundation of China(21563025); National Natural Science Foundation of China(22162022)

开发了一种溶剂介导吡咯并[1,2-a]喹喔啉和N-碘代丁二酰亚胺(NIS)的区域选择性C—H碘化, 分别以CHCl3N,N-二甲基甲酰胺(DMF)为溶剂, 选择性地生成了1-碘吡咯并[1,2-a]喹喔啉和3-碘吡咯并[1,2-a]喹喔啉. 此外,吡咯并[1,2-a]喹喔啉与N-溴代丁二酰亚胺(NBS)的溴代反应得到主要产物为1,3-二溴吡咯并喹喔啉. 该方法具有反应条件简单温和、区域选择性好、底物范围广、克级合成等特点. 此外,还通过钯和碘催化的C—X (X=C, S)键形成反应研究了卤化吡咯并[1,2-a]喹喔啉产物的进一步转化.

关键词: 溶剂介导, 区域选择性, 吡咯并[1,2-a]喹喔啉, C—H键碘代

A solvent mediated regioselective C—H iodination of pyrrolo[1,2-a]quinoxaline with N-iodo-succininide (NIS) has been developed. 1-Iodopyrrolo[1,2-a]quinoxalines and 3-iodopyrrolo[1,2-a]quinoxalines could be selectively synthesized by using CHCl3 and N,N-dimethylformamide (DMF) as solvents, respectively. Furthermore, 1,3-dibromopyrroloquinoxalines were obtained as the main products by the bromination of pyrrolo[1,2-a]quinoxaline with N-bromo-succinimide (NBS). The method features simple and mild reaction conditions, good regioselectivity, broad substrate scope, and gram-scale synthesis. In addition, the further transformation of halogenated pyrrolo[1,2-a]quinoxaline products has also been investigated through palladium and iodine catalyzed C—X (X=C, S) bond formation reactions.

Key words: solvent-mediated, regioselectivity, pyrrolo[1,2-a]quinoxaline, C—H bond iodination