波谱学杂志 ›› 2005, Vol. 22 ›› Issue (1): 35-41.

• 研究论文 • 上一篇    下一篇

扁枝藓中锯齿石松烷型三萜的NMR化学位移全归属

  

  1. 山东大学 药学院,  山东 济南 250012
  • 收稿日期:2004-08-23 修回日期:2004-11-01 出版日期:2005-03-05 发布日期:2005-03-05
  • 基金资助:

    国家自然科学基金资助项目(30271537).

Complete NMR Chemical Shift Assignments for Three Serratane Triterpenoids Isolated from Moss Homalia Trichomanoides

  1. School of Pharmaceutical Sciences, Shandong University, Jinan 250012, China
  • Received:2004-08-23 Revised:2004-11-01 Online:2005-03-05 Published:2005-03-05
  • Supported by:

    国家自然科学基金资助项目(30271537).

摘要:

从扁枝藓(Homalia trichomanoides)中分得了三个锯齿石松烷型三萜化合物: 3α-甲氧基-锯齿石松-14-烯-21β-醇(1)、3β-甲氧基-锯齿石松-14-烯-21β-醇(2)和3β-甲氧基-锯齿石松-14-烯-21-酮(3),  应用1D和各种2D NMR实验技术(包括1H-1H COSY,  HMQC和HMBC)对化合物结构进行了研究,  对1H和13C化学位移进行了完全归属,  并根据1H NMR中信号的裂分对三个化合物C-3位与1和2的C-21位的立体构型作出了判断

关键词: NMR, 归属, HMQC, HMBC, 锯齿石松烷型三萜, 扁枝藓

Abstract:

The chemical structures of three serratane type triterpenoids isolated from the moss Homalia trichomanoides (Hedw.) B. S. G. were elucidated as 3α-methoxyserrat-14-en-21β-ol (1), 3β-methoxy-serrat-14-en-21β-ol (2) and 3β-methoxyserrat-14-en-21-one (3). Their 1H and 13C chemical shifts were assigned using 1D and 2D NMR spectroscopy (including 1H-1H COSY, HMQC and HMBC). Stereochemistry of C-3 for the three compounds and that of C-21 for compounds 1 and 2 were determined by coupling patterns in the 1H NMR spectra.

Key words: NMR, assignment, HMQC, HMBC, serratane type triterpeniods, Homalia trichomanoides

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