Synthesis and analgesic and antiinflammatory activity of methyl 6-substituted-3(2h)-pyridazinone-2-ylacetate derivatives.
A series of methyl 6-substituted-3(2H)-pyridazinone-2-ylacetates 9 were synthesized and their analgesic and anti-inflammatory effects were evaluated in the phenylbenzoquinone-induced writhing test (PBQ test) and carrageenan-induced paw edema method, respectively. Side effects of the compounds were examined on gastric mucosa. None of the compounds showed gastric ulcerogenic effect compared with reference nonsteroidal anti-inflammatory drugs. Methyl 6-(4-(4-fluorophenyl)piperazine)-3(2H)-pyridazinone-2-ylacetate 9e was found to be more active than acetylsalicylic acid (ASA). Methyl 6-(4-(2-ethoxyphenyl)piperazine)-3(2H)-pyridazinone-2-ylacetate 9c has shown an anti-inflammatory activity as compared to the standard compound indometacin at the carrageenan-induced paw edema method.A significant dependence of the anti-inflammatory effect on the substituents has been observed. The pharmacological study of these compounds confirms that modification of the chemical group at the position 6 of the 3(2H)-pyridazinone system influences analgesic and anti-inflammatory activities. The structures of these new pyridazinone derivatives were confirmed by their IR and (1)H-NMR spectra and elemental analysis.
Sahina
M F
MF
Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Gazi University, Ankara, Turkey.
Badiçoglu
B
B
Gökçe
M
M
Küpeli
E
E
Yeşilada
E
E
D000085:Acetates / Q000138:chemical synthesis*; D018712:Analgesics, Non-Narcotic / Q000138:chemical synthesis* / Q000494:pharmacology* / Q000633:toxicity; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000138:chemical synthesis* / Q000494:pharmacology* / Q000633:toxicity; D002351:Carrageenan; D004487:Edema / Q000139:chemically induced / Q000517:prevention & control; D008297:Male; D051379:Mice; D008970:Molecular Weight; D010147:Pain Measurement / Q000187:drug effects; D011724:Pyridazines / Q000138:chemical synthesis* / Q000494:pharmacology*; D013276:Stomach Ulcer / Q000139:chemically induced
D000085:Acetates; D018712:Analgesics, Non-Narcotic; D000894:Anti-Inflammatory Agents, Non-Steroidal; D011724:Pyridazines; D002351:Carrageenan