RESUMO
The new series of asymmetrical pyrazole curcumin analogues 4a-g were synthesized by using polyethylene glycol (PEG-400) as a green reaction medium and evaluated for their in vivo analgesic and in vitro antioxidant (H2 O2 , DPPH, Ferrous reducing power and Nitric oxide scavenging activity) and anti-inflammatory activities. All the compounds synthesized 4a-g showed the potential to demonstrate analgesic activity as compared to the standard ibuprofen. Among the tested series, compounds 4e and 4b exhibited good hydrogen peroxide scavenging activity as compared to the standard butylated hydroxy toluene (BHT). Compounds 4b, 4d, 4f, and 4g showed good DPPH free radical scavenging activity. Compounds 4b, 4c, 4d, 4e and 4g showed excellent ferrous-reducing power activity, whereas all the compounds showed better nitric oxide scavenging activity than standard ascorbic acid. Additionally, all the synthesized compounds were also screened for their in vitro anti-inflammatory activity. Compounds 4b, 4d, 4f and 4g showed good anti-inflammatory activity as compared to standard diclofenac sodium.
Assuntos
Anti-Inflamatórios/síntese química , Curcumina/análogos & derivados , Curcumina/farmacologia , Polietilenoglicóis/química , Pirazóis/química , Administração Oral , Analgésicos/síntese química , Analgésicos/metabolismo , Analgésicos/farmacologia , Animais , Anti-Inflamatórios/química , Anti-Inflamatórios/metabolismo , Anti-Inflamatórios/farmacologia , Antioxidantes/síntese química , Antioxidantes/química , Antioxidantes/metabolismo , Antioxidantes/farmacologia , Comportamento Animal/efeitos dos fármacos , Avaliação Pré-Clínica de Medicamentos , Espectroscopia de Ressonância Magnética , Camundongos , Óxido Nítrico/química , Desnaturação Proteica , Espectrofotometria InfravermelhoRESUMO
A new series of fluoro substituted pyrazoline derivatives 5a-g and 6a-g were synthesized in good to excellent yield from the corresponding pyrazole chalcones, 4a-g, by using polyethylene glycol-400 (PEG-400) as an alternative reaction medium. The newly synthesized compounds were characterized and screened for their in vivo antiinflammatory and analgesic activity. Compounds 5g and 6g were found to be more potent than standard drug Diclofenac and six other compounds 5b, 5c, 5f, 6b, 6c and 6f showed significant antiinflammatory activity as compared to standard drug. Compounds 5c, 5d, 5e, 5f, 6c, 6d, 6e and 6f showed significant analgesic activity as compared to standard drug Aspirin.
