نتایج جستجو برای: imidazoles
تعداد نتایج: 3709 فیلتر نتایج به سال:
Unsaturated vegetable oils and their corresponding fatty acid derivatives constitute interesting renewable platforms for the preparation of heterocycles, notably through formation oxygenated intermediates. In this work, imidazoles were prepared from 1,2-diketones Debus-Radziszewski reaction. The reaction was optimized under microwave irradiation using a 1,2-diketone derived methyl oleate ammoni...
A simple, reliable, and inexpensive assay for quantitation of the imidazole drugs miconazole, RV 40,500, and RV 41,400 was tested. The assay, similar to a Kirby-Bauer test, was sensitive to less than or equal to 0.2 mug of drug per ml and linear from less than or equal to 0.2 to 10.0 mug/ml. Concentration of inoculum and agar depth in test plates was not as critical as the type of medium, amoun...
Research activities in the field of imidazole-derived push-pull systems featuring intramolecular charge transfer (ICT) are reviewed. Design, synthetic pathways, linear and nonlinear optical properties, electrochemistry, structure-property relationships, and the prospective application of such D-π-A organic materials are described. This review focuses on Y-shaped imidazoles, bi- and diimidazoles...
Al-MCM-41 nanoreactors is found to be a remarkable efficient catalyst for one-pot multicomponent cyclocondensation of benzil, aniline or ammonium acetate and aromatic aldehydes for the synthesis of polysubstituted imidazoles under solvent-free conditions. The reaction was efficiently promoted by 10 mg nano-Al-MCM-41 and the heterogeneous catalyst was recycled for four runs in this reaction with...
objective(s) in recent years highly selective cox-2inhibitors were withdrawn from the market because of an increased risk of cardiovascular complications. in this study we were looking for potent compounds with moderate selectivity for cox-2. so, four analogues of 4, 5-diaryl-2-(2-alkylthio-5-imidazolyl) imidazole derivatives were synthesized and their anti-inflammatory and anti-nociceptive act...
A project for the development of Structure-Activity Relationship for Biodegradation is presented. The aim of the project is to assemble sets of structural rules governing the potential microbial degradability of (classes of) chemicals. These rules will provide tools to take into account the biodegradation aspects of a product--and all precursors in the production process--early in the product d...
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