Synthesis, pharmacological screening, quantum chemical and in vitro permeability studies of N-Mannich bases of benzimidazoles through bovine cornea
| Autor: | E. Philip Jesudason, S. K. Sridhar, P. Shanmugapandiyan, D. Selvaraj, Mohammed Inayathullah, V. Arul, E. J. Padma Malar, Rajadas Jayakumar |
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| Rok vydání: | 2009 |
| Předmět: |
Models
Molecular Benzimidazole Cell Membrane Permeability Tertiary amine Stereochemistry Anti-Inflammatory Agents Drug Evaluation Preclinical Mannich base Medicinal chemistry Chemical synthesis Cornea Mannich Bases chemistry.chemical_compound Drug Discovery Animals HOMO/LUMO Pharmacology Analgesics Chemistry Hydrogen bond Organic Chemistry Hydrogen Bonding Biological activity General Medicine Proton NMR Benzimidazoles Cattle |
| Zdroj: | European Journal of Medicinal Chemistry. 44:2307-2312 |
| ISSN: | 0223-5234 |
| DOI: | 10.1016/j.ejmech.2008.03.043 |
| Popis: | A novel series of N-Mannich bases of benzimidazole derivatives were synthesized and characterized by (1)H NMR, IR spectral studies and elemental analysis. The compounds were screened for analgesic and anti-inflammatory activity. 1-((Diethylamino)-methyl)-2-styryl benzimidazole 4 at 40mg/kg was found to be equipotent to paracetamol. 1-((Piperidin-1-yl) methyl)-2-styryl-benzimidazole 6 at 40mg/kg was found to be more potent than Diclofenac. Corneal permeability and quantum chemical calculations were performed to correlate the hydrogen bonding ability with permeability and activity. The energies of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) were correlated with pharmacological activity. The semi-empirical PM3 calculations (quantum chemical calculations) revealed that E(LUMO) and energy gap DeltaE were capable of accounting for the high in vitro bovine corneal permeability and activity of the compounds. |
| Databáze: | OpenAIRE |
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