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高等学校化学研究 ›› 2014, Vol. 30 ›› Issue (3): 455-460.doi: 10.1007/s40242-014-4012-3

• Articles • 上一篇    下一篇

Theoretical Calculations of the pKa Values of 1-Aryl-4-propylpiperazine Drugs in Aqueous Solution

FAN Linlin1, YANG Xin1, TIAN Zhiyue1, ZHAO Xuekun1, LI Ruixiang1, XUE Ying1,2   

  1. 1. Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China;
    2. State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, P. R. China
  • 收稿日期:2014-01-09 修回日期:2014-04-03 出版日期:2014-06-01 发布日期:2014-04-14
  • 通讯作者: XUE Ying E-mail:yxue@scu.edu.cn
  • 基金资助:

    Supported by the National Natural Science Foundation of China(Nos.21173151, J1103315) and the National Basic Research Program of China(No.2011CB201202).

Theoretical Calculations of the pKa Values of 1-Aryl-4-propylpiperazine Drugs in Aqueous Solution

FAN Linlin1, YANG Xin1, TIAN Zhiyue1, ZHAO Xuekun1, LI Ruixiang1, XUE Ying1,2   

  1. 1. Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China;
    2. State Key Laboratory of Biotherapy, Sichuan University, Chengdu 610041, P. R. China
  • Received:2014-01-09 Revised:2014-04-03 Online:2014-06-01 Published:2014-04-14
  • Contact: XUE Ying E-mail:yxue@scu.edu.cn
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.21173151, J1103315) and the National Basic Research Program of China(No.2011CB201202).

摘要:

Theoretical calculations were carried out to predict the aqueous-phase acidities of a series of drug 1-phenyl-4-propylpiperazine and its derivatives. The performances of the density functional theory(DFT) methods B3LYP and B3P86, solvation models[the polarized continuum model(PCM) and the conductor-like polarized continuum model(CPCM)], and the basis set effect were tested. A comparison between the theoretical and experimental pKa values for para-substituted 1-phenyl-4-propylpiperazines reveals that the accuracy of B3LYP is better than that of B3P86, and the basis set 6-31++G(d,p) and the CPCM model are suitable for calculating pKa values of the substituted 1-phenyl-4-propylpiperazine. For the investigated compounds, a reasonable agreement between the experimental and calculated pKa values was also observed.

关键词: 1-Arylpiperazine, Aqueous pKa, B3LYP, B3P86, Conductor-like polarized continuum model(CPCM)

Abstract:

Theoretical calculations were carried out to predict the aqueous-phase acidities of a series of drug 1-phenyl-4-propylpiperazine and its derivatives. The performances of the density functional theory(DFT) methods B3LYP and B3P86, solvation models[the polarized continuum model(PCM) and the conductor-like polarized continuum model(CPCM)], and the basis set effect were tested. A comparison between the theoretical and experimental pKa values for para-substituted 1-phenyl-4-propylpiperazines reveals that the accuracy of B3LYP is better than that of B3P86, and the basis set 6-31++G(d,p) and the CPCM model are suitable for calculating pKa values of the substituted 1-phenyl-4-propylpiperazine. For the investigated compounds, a reasonable agreement between the experimental and calculated pKa values was also observed.

Key words: 1-Arylpiperazine, Aqueous pKa, B3LYP, B3P86, Conductor-like polarized continuum model(CPCM)