Chinese Journal of Magnetic Resonance ›› 1992, Vol. 9 ›› Issue (3): 289-295.

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2D NMR STUDIES ON SESQUITERPENE ALKALOIDS FROM CELASTRUS ANGULATUS

Liu Jikai1, Han Xiuwen2, Wu Dagang3, Jia Zhongjian4   

  1. 1. Department of Chemistry, Zhongshan University, Guangzhou, 510275;
    2. Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian;
    3. Kunming Institute of Botany, The Chinese Academy of Sciences, Kunming;
    4. Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou
  • Received:1991-06-07 Revised:1991-10-21 Published:1992-09-05 Online:2018-01-20

Abstract: DEPT and 2D NMR techniques including 1H-1H COSY, 1H-13C COSY, NOESY and 1H-13C COLOC were used to investigate the structures of two sesquiterpene alkaloids with polyester groups. It worth noted specially that 1H-13C COLOC is a very powerful tool for the location of each substituent on the skeleton. The stereo structures were deduced from the coupling constants in1H NMR and NOESY.

Key words: 2D NMR, Celastrus angaulatus, Sesquiterpene alkaloids