Prospecção química e biológica de novos complexos de Cu2+ e Ag+ baseados em ligantes contendo o grupo farmacofórico 1,4-dioxo-butenil

Abstract

Cancer is a major public health problem which requires constant efforts to develop new ways of fighting it. Here, the synthesis of new cooper (II) and silver (I) complexes, containing 1,4-dioxo-butenyl group was performed to obtain chemotherapeutic drugs as efficient as cisplatin and lower toxicity to healthy cells. The syntheses were carried out in two stages; the first consisted in obtaining the ligands from the reaction of maleic anhydride with substituted anilines and with 4-aminoantipyrine and the second one is the obtainment of the complexes from the reaction of the ligands with the copper (II) and silver (I) salts. The characterization of the substances was carried out by 1H and 13C Nuclear Magnetic Resonance (NMR), by Infrared Spectroscopy and Thermogravimetric Analysis data. Biological evaluation of the substances was done by the tetrazolium bromide method against murine mammary adenocarcinoma cells (4T1), which the synthesized substances, tested at concentrations of 6.25 to 500 μg/mL, showed cytotoxic activity and may be more efficient than cisplatin in causing death of 4T1 cell line.