波谱学杂志

• 研究论文 • 上一篇    下一篇

吲哚衍生物NMR数据归属及其溶剂效应研究

杨二冰,马利波,王金辉,叶勇*   

  1. 郑州大学 化学与分子工程学院, 河南省化学生物学与有机化学重点实验室, 河南 郑州 450052
  • 收稿日期:2012-06-18 修回日期:2012-10-20 出版日期:2013-06-05 发布日期:2013-06-05
  • 作者简介:杨二冰(1980-),女,河南新密人,硕士,实验师,主要从事化学、生物学和波谱学研究. E-mail: erbing022@163.com. *通讯联系人:叶勇,电话:0371-67767051,E-mail: yeyong@zzu.edu.cn.
  • 基金资助:

    国家自然科学基金资助项目(20972143).

NMR Signal Assignment and Solvent Effects of N-substituted Indoles

YANG Er-bing, MA Li-bo, WANG Jin-hui, YE Yong*   

  1. Key Laboratory of Chemical Biology and Organic Chemistry of Henan Province, College of Chemistry and Molecular engineering, Zhengzhou University, Zhengzhou 450052, China
  • Received:2012-06-18 Revised:2012-10-20 Online:2013-06-05 Published:2013-06-05
  • About author:*Corresponding author:Ye Yong,Tel: 0371-67767051,E-mail: yeyong@zzu.edu.cn.
  • Supported by:

    国家自然科学基金资助项目(20972143).

摘要:

吲哚及其衍生物具有独特的生理活性,该文主要应用1D NMR 和2D NMR技术(COSY, HSQC, HMBC, NOESY)对合成的吲哚衍生物的1H NMR、13C NMR谱信号进行了全归属. 用变温NMR研究了N-叔丁氧羰基吲哚(化合物m)中C-N键的旋转受阻对氢谱和碳谱的影响,计算了融合温度下C-N键旋转速率为175 Hz,此温度下活化自由能为12 kcal/mol. 研究了化合物m的溶剂效应,发现在低极性溶剂中的C-N键的旋转阻力大于极性溶剂.

关键词: 核磁共振(NMR), 归属, 构象, 变温NMR, 吲哚衍生物

Abstract:

1H and 13C NMR signals of N-substituted indole derivatives were assigned using 1D and 2D NMR techniques. The effects of C-N bond rotation barrier on the 1H and 13C NMR signals in compound m was studied using variable-temperature NMR. Rotation rate and free energy were calculated under coalesce temperature. The rotation barrier dependence on the solvent effects of m was also studied. It was found that the rotation barrier about C-N in m was higher in polar solvent.

Key words: NMR, assignment, conformation, variable-temperature NMR, N-substituted indole derivatives

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