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Acta Physico-Chimica Sinica  2006, Vol. 22 Issue (04): 486-491    DOI: 10.3866/PKU.WHXB20060419
Physicochemical Parameters of Substituents and Its Application in Quantitative Structure Activity Relationship for Drugs
ZHOU Yuan;MEI Hu;LIANG Gui-Zhao;LI Zhi-Liang
Key Laboratory of Biomedical Engineering of Educational Ministry and Chongqing City; College of Biomedical Engineering; College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, P. R. China; Department of Chemistry and Chemical Engineering, Hunan Engineering Institute, Xiangtan 411101, P. R. China
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Abstract  A novel substituent descriptor based on the 17 different physicochemical parameters about the electronic, hydrophobic and steric properties of substituents is used to describe the chemical structures of 22 cyclic ureas and 22 N,N-dimethyl-2-bromo(substituted phenyl) ethylamine derivatives, respectively. The variables are reduced using stepwise multiple regression (SMR) method for the training set, and the statistical results indicate that the correlation coefficient square for the two series of compounds in the multiple linear regression and cross validation using leave one out (LOO) is 0.853, 0.960, 0.723 and 0.901, respectively. To validate the predictive power of resulting models, external validation are performed for two testing sets with Qext2 values of 0.7617 and 0.7653, respectively. The models obtained also shows that the anti-HIV activity of cyclic ureas is blocked by steric hindrance of ortho and para substituents and hydrophobicity of meta and para substituents, the biological activity of N,N-dimethyl-2-bromo (substituted phenyl) ethylamine derivatives may be improved by introducing the steric substituents and electronic supplying para substituents into phenyl ring.

Key wordsCyclic ureas      N,N-dimethyl-2-bromo(substituted phenyl) ethylamine derivatives      Physicochemical parameters of substituent      Quantitative structure activity relationship (QSAR)     
Received: 15 July 2005      Published: 10 April 2006
Corresponding Authors: LI, Zhi-Liang     E-mail:
Cite this article:

ZHOU Yuan;MEI Hu;LIANG Gui-Zhao;LI Zhi-Liang. Physicochemical Parameters of Substituents and Its Application in Quantitative Structure Activity Relationship for Drugs. Acta Physico-Chimica Sinica, 2006, 22(04): 486-491.

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