RESUMO
A series of ring substituted 3-phenyl-1-(1,4-di-N-oxide quinoxalin-2-yl)-2-propen-1-one derivatives were synthesized and tested for in vitro leishmanicidal activity against amastigotes of Leishmania amazonensis in axenical cultures and murine infected macrophages. Structure-activity relationships demonstrated the importance of a radical methoxy at position R3', R4' and R5'. (2E)-3-(3,4,5-trimethoxy-phenyl)-1-(3,6,7-trimethyl-1,4-dioxy-quinoxalin-2-yl)-propenone was the most active. Cytotoxicity on macrophages revealed that this product was almost six times more active than toxic.
Assuntos
Animais , Feminino , Camundongos , Antiprotozoários/química , Óxidos N-Cíclicos/química , Leishmania mexicana/efeitos dos fármacos , Quinoxalinas/química , Antiprotozoários/farmacologia , Antiprotozoários/toxicidade , Óxidos N-Cíclicos/farmacologia , Óxidos N-Cíclicos/toxicidade , Camundongos Endogâmicos BALB C , Macrófagos/efeitos dos fármacos , Testes de Sensibilidade Parasitária , Quinoxalinas/farmacologia , Quinoxalinas/toxicidade , Relação Estrutura-AtividadeRESUMO
A series of ring substituted 3-phenyl-1-(1,4-di-N-oxide quinoxalin-2-yl)-2-propen-1-one derivatives were synthesized and tested for in vitro leishmanicidal activity against amastigotes of Leishmania amazonensis in axenical cultures and murine infected macrophages. Structure-activity relationships demonstrated the importance of a radical methoxy at position R3', R4' and R5'. (2E)-3-(3,4,5-trimethoxy-phenyl)-1-(3,6,7-trimethyl-1,4-dioxy-quinoxalin-2-yl)-propenone was the most active. Cytotoxicity on macrophages revealed that this product was almost six times more active than toxic.
