波谱学杂志

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黄酮类化合物的原子电距矢量表达及核磁共振碳谱

张梦军, 廖春阳,  周丽平, 吴世容, 李声时*   

  1. 重庆大学化学化工学院, 重庆  400044
  • 收稿日期:2002-01-14 修回日期:2002-04-15 出版日期:2002-09-05 发布日期:2002-09-05
  • 作者简介:张梦军(1973-),女,理学硕士,助理工程师. *通讯联系人
  • 基金资助:

    重庆市应用基础项目、国家春晖计划教育部启动基金、霍英东基金及国家新药基金资助项目.

ON PRELIMINARY APPROACH TO ESTIMATION AND PREDICTION OF CHEMICAL SHIFT OF 13C NMR SPECTROSCOPY IN FLAVONOIDS ON VECTOR OF
ATOMIC FLECTRONEGATIVE DISTANCE(VAED)

ZHNAG Meng-jun,  LIAO Chun-yang, ZHOU Li-ping, WU Shi-rong,  LI Sheng-shi*   

  1. College of Chemistry and Chemical Engineering (CCCE), Laboratory of Green Chemi stry and Molecular Pharmacy (LGCMP), Chongqing University, Chongqing 400044, China
  • Received:2002-01-14 Revised:2002-04-15 Online:2002-09-05 Published:2002-09-05
  • About author:*Correspondence author
  • Supported by:

    重庆市应用基础项目、国家春晖计划教育部启动基金、霍英东基金及国家新药基金资助项目.

摘要:

提出以原子电性距离矢量(VAED)描述19种黄酮醇和21种黄酮中不同等价碳原子的化学微环境,结合碳原子类型,建立核磁共振碳谱(13C  NMR)化学位移(CS)的四 参数线性模型,  对于19种黄酮醇285个碳原子其回归方程:Y(1)=72.097+20.803 X(1)+14.395 X(2)+ 12.030  X(3);对于21种黄酮315个碳原子其回归方程:Y(1)=85.530+19.174 X(1)+15.565 X (2)+5.495 X(3);黄酮醇和黄酮一起建模的回归方程为:Y(1)=77.679+20.373 X(1)+15.481 X(2)+9.004 X(3). 用于黄酮醇和黄酮分子等价碳原子化学位移的估计. 样本数目,相关系数,标准偏差,F统计值,回归平方和和残差平方和分别为:N=285,R=0.796,SD=14.734,F=162.315,U=105 705.359,Q=60 999.156 ;N=31 5,R=0.884,SD=12.381,F=369.114,U=169 745.141,Q=47 673.375和N=600,R=0.831,SD =14.122, F=443.449,U=265 310.563,Q=118 859.906. 经交互校验,模型稳定性较好. 并综合几种处理方法,找到一种较好的建模方法,作为初次有益的探讨,对黄酮和黄酮醇核磁共振碳谱建模效果尚好.

关键词: 原子电距矢量(VAED), 13C NMR波谱模拟, 化学位移, 黄酮类化合物

Abstract:

In the present paper, various chemical shifts of 13C NMR for differe nt chemically equivalent carbon atoms in nineteen natural flavonols and twenty one natural flavones were estimated and /or predicted using the atomic electr onegative distance vector(VAED) with 4-element parameter: The sample numbers  N, correlation coefficients R, standard deviation SD, F-statistic value F, regression quadratic sum and residual quadratic sum.are N=285, R=0.796, SD=14.734 , F= 162.315, U=105705.359, Q=60999.156; N=315, R=0.884, SD=12.381, F=369.114, U=1697 45.141, Q=47673.375; N=600, R=0.831, SD=14.122, F=443.449, U=265310.563 and Q=118 859.906, for flavonols, flavones, and flavonoids, respectively. Finally, cross  validation with the leaveone out (LOO) procedure was made by the QSSR equations for all carbon atoms,  with the good results obtained. A relative  reliable correlation model has been developed by the atomic electronegative distance vector , as adjoin structural descriptors. The modelling results were fairly good.

Key words: vector of atomic electronegative distance(VAED), carbon-13 nuclear magnetic resonance spectroscopy, chemical shift, flavonoids

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