期刊
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
卷 44, 期 5, 页码 2307-2312出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2008.03.043
关键词
Mannich base; Benzimidazole; Analgesic; Anti-inflammatory; Corneal permeability; Quantum chemical calculations
资金
- Council of Scientific and Industrial Research (CSIR, New Delhi, India)
A novel series of N-Mannich bases of benzimidazole derivatives were synthesized and characterized by H-1 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 40 mg/kg was found to be equipotent to paracetamol. 1-((Piperidin-1-yl) methyl)-2-styryl-benzimidazole 6 at 40 mg/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 Delta E were capable of accounting for the high in vitro bovine corneal permeability and activity of the compounds. (C) 2008 Elsevier Masson SAS. All rights reserved.
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