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DFT-based QSAR study of testosterone and its derivatives
P P Singh1, H K Srivastava, F A Pasha
1Department of Chemistry M. L. K. (P.G.) College Balrampur, (U.P.), India. fpa-sha@rediffmail.com
Bioorganic & Medicinal Chemistry
|December 31, 2003
Summary
This quantitative structure-activity relationship (QSAR) study used quantum mechanical parameters like absolute hardness and electronegativity to analyze testosterone derivatives. Absolute hardness proved more valuable for QSAR development than electronegativity.
Area of Science:
- Computational Chemistry
- Medicinal Chemistry
- Molecular Modeling
Background:
- Quantitative Structure-Activity Relationship (QSAR) studies are crucial for drug design.
- Testosterone derivatives are important in various biological applications.
- Understanding molecular properties can predict biological activity.
Purpose of the Study:
- To perform a QSAR study on testosterone derivatives.
- To investigate the utility of quantum mechanical parameters, specifically absolute hardness (eta) and electronegativity (chi), in QSAR.
- To correlate these parameters with the activity of testosterone derivatives.
Main Methods:
- Density functional theory was used to derive quantum mechanical parameters.
- 3-D modeling and geometry optimization were performed using PCMODEL software.
- Semiempirical PM3 calculations were conducted using WinMOPAC-7.21 software.
Main Results:
- Absolute Hardness (eta) provided valuable insights for QSAR development, aligning with the maximum hardness principle.
- Electronegativity (chi) offered less clear information compared to absolute hardness.
- The study established a correlation between quantum chemical descriptors and the activity of testosterone derivatives.
Conclusions:
- Absolute Hardness is a significant descriptor for QSAR studies of testosterone derivatives.
- Quantum mechanical parameters derived from DFT can effectively be used in QSAR modeling.
- Further research can refine QSAR models using these parameters for drug discovery.