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    Design and synthesis of some thiazolotriazolyl esters as anti-inflammatory and analgesic agents
    (Springer Birkhauser, 2012) Tozkoparan, Birsen; Aytac, S. Peri; Gursoy, Sule; Aktay, Goknur
    In order to develop potent analgesic/anti-inflammatory compounds with reduced ulcerogenic risk, a series of thiazolotriazolyl-carboxylic and acetic acid esters were synthesized and characterized by spectral and elementary analysis. All synthesized compounds were screened for in vivo anti-inflammatory activities in mice by carregeenan-induced paw edema model. The compounds showing 20% reduction in paw edema were also evaluated for their analgesic activities by acetic acid-induced writhing test and the gastric ulceration risk by determining the lipid peroxidation level in stomachs. Among the compounds tested, compounds 1, 4, 6, 7, 8, 1a, 2a, 3a, 4a, 7a, 2b, and 8b showed moderate-to-good anti-inflammatory activity at various doses in any of the measurement intervals. Compounds 7a, 2b, and 8b were the most actives of the series in analgesic activity test. Moreover, compounds 1, 4, and 8 were found to be safe in stomach in respect of free radical production.
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    Synthesis of 3,6-disubstituted 7H-1,2,4-triazolo[3,4-b]-1,3,4-thiadiazines as novel analgesic/anti-inflammatory compounds
    (Elsevier France-Editions Scientifiques Medicales Elsevier, 2009) Aytac, S. Peri; Tozkoparan, Birsen; Kaynak, F. Betuel; Aktay, Goeknur; Goektas, Oezguer; Uenuevar, Songuel
    In this study, a new class of 4-amino-3-substituted-1,2,4-triazole-5-thiones (1-4) and their corresponding condensed derivatives 3,6-disubstituted 7H-1,2,4-triazolo[3,4-bi-1,3,4-thiadiazines (1a-4c) were synthesized and evaluated for their analgesic/anti-inflammatory activities. All synthesized compounds were also tested for their gastric toxicity and antioxidant activity on acute administration. Most of the compounds showed significant activity in both carrageenan-induced oedema and acetic acid-induced writhing tests besides negligible gastrointestinal toxicity. The compounds showing less ulcerogenic effect also showed less lipid peroxidation (LPO) level. Most promising results were obtained with the compounds that placed a fluoro or a chloride on the phenyl ring at the sixth position of the fused ring. (C) 2009 Elsevier Masson SAS. All rights reserved.