有机化学 ›› 2018, Vol. 38 ›› Issue (12): 3381-3385.DOI: 10.6023/cjoc201807003 上一篇    下一篇

研究简报

铜催化的1,3-二羰基化合物、甲醇和乙酸铵的串联氧化环化合成2,3,5,6-四取代吡啶

闫溢哲a,b, 李政a, 崔畅a, 刘延奇a   

  1. a 郑州轻工业学院食品与生物工程学院 郑州 450000;
    b 食品生产与安全河南省协同创新中心 郑州 450000
  • 收稿日期:2018-07-01 修回日期:2018-07-12 发布日期:2018-08-22
  • 通讯作者: 闫溢哲, 刘延奇 E-mail:yanyizhe@mail.ustc.edu.cn;liuyanqi@zzuli.edu.cn
  • 基金资助:

    国家自然科学基金(No.21502177)、河南省科技攻关计划(No.182102310903)、郑州轻工业学院博士研究基金(No.2014BSJJ032)和郑州轻工业学院青年骨干教师资助项目.

Synthesis of 2,3,5,6-Tetrasubstituted Pyridines via Copper-Catalyzed Domino Oxidative Annulation of 1,3-Dicarbonyl Compounds with Methanol and Ammonium Acetate

Yan Yizhea,b, Li Zhenga, Cui Changa, Liu Yanqia   

  1. a School of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450000;
    b Collaborative Innovation Center of Food Production and Safety, Henan 450000
  • Received:2018-07-01 Revised:2018-07-12 Published:2018-08-22
  • Contact: 10.6023/cjoc201807003 E-mail:yanyizhe@mail.ustc.edu.cn;liuyanqi@zzuli.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (No. 21502177), the Scientific and Technological Breakthrough Plan of Henan Province (No. 182102310903), the Doctoral Research Foundation of Zhengzhou University of Light Industry (No. 2014BSJJ032), and the Grants Program of Youth Backbone Teachers Training Object of Zhengzhou University of Light Industry.

首次发展了一个铜催化的1,3-二羰基化合物、甲醇和乙酸铵的串联氧化形式环加成反应,能以中等到优异的产率合成一系列对称的2,3,5,6-四取代吡啶.反应中,甲醇既可作为反应溶剂,又可作为产物中吡啶环骨架的碳合成子.初步机理研究表明,该反应可能经历了一个自由基历程,且甲醇中甲基的碳氢键断裂为反应的决速步骤.该合成方法具有操作简单、环境友好等优点.

关键词: 铜, 氧化环化, 吡啶, 甲醇

A copper-catalyzed oxidative formal cycloaddition of 1,3-dicarbonyl compounds, methanol and ammonium acetate was first demonstrated, affording symmetrical 2,3,5,6-tetrasubstituted pyridines in moderate to excellent yields. Methanol was employed as the carbon synthon as well as the reaction solvent. The preliminary mechanistic studies revealed that the reaction underwent a radical pathway and the C(sp3)-H bond cleavage of methanol was the rate-determining step. This method is operationally simple and environmentally friendly.

Key words: copper, oxidative annulation, pyridine, methanol