Synthesis and preliminary evaluation of new 5-pyrazolinone derivatives as analgesic agents

Gursoy A., Demirayak S., Capan G., Erol K., Vural K.

EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY, cilt.35, sa.3, ss.359-364, 2000 (SCI-Expanded) identifier identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 35 Sayı: 3
  • Basım Tarihi: 2000
  • Doi Numarası: 10.1016/s0223-5234(00)00117-3
  • Dergi Adı: EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Index Chemicus (IC)
  • Sayfa Sayıları: ss.359-364
  • Anahtar Kelimeler: pyrazolin-5-one, oxazole, synthesis, analgesic activity
  • Anadolu Üniversitesi Adresli: Hayır

Özet

New 4-(aroyloxyalkanoyl)-2,3-dimethyl-1-phenyl-3-pyrazolin-5-ones (5) were cyclized to 4-(2-aryl-5-unsubstituted/substituted oxazol-4-yl)-2,3-dimethyl-1-phenyl-3-pyrazolin-5-ones (6) employing the Davidson procedure. Preliminary evaluation of analgesic activity revealed that the effect of 4-(2-phenyl-5-ethyloxazol-4-yl)-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one and 4-[2-(4-chlorophenyl)-5-ethyloxazol-4-yl]-2,3-dimethyl-1-phenyl-3-pyrazoline-5-one on acetic acid induced writhing was superior to that of antypyrine and aminopyrine. 4-[2-(4-Chlorophenyl)-5-methyloxazol-4-yl]-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one and 4-[2-(4-methoxyphenyl)-5-ethyloxazol-4-yl]-2,3- dimethyl-1-phenyl-3-pyrazolin-5-one were more potent than aminopyrine, whereas 4-(2-phenyl-5-methyloxazol-4-yl)-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one and 4-[2-(4-methoxyphenyl)-5-methyl-oxazol-4-yl]-2,3-dimethyl-1-phenyl-3-pyrazolin-5-one were not as active (modified Koster's Test; 0.19-0.21 mmol.kg(-1)). None of the selected entries showed inhibition of formaldehyde-induced paw oedema. (C) 2000 Editions scientifiques et medicales Elsevier SAS.