Síntese e caracterização de novos compostos de coordenação de oxidovanádio (IV) contendo ligantes podantes

Abstract

Since the 70’, inorganic compounds have been studied and applied as alternatives in the treatment of several diseases such as cancers, rheumatoid arthritis, and diabetes mellitus (DM). The latter is a disease that, due to its high incidence, has worrying epidemiological numbers. DM can be caused by genetic or external factors and causes serious disturbances in the metabolism of proteins, carbohydrates, and lipids, and can be classified into two subtypes. Type 1 (DM1) is caused by the non-secretion of insulin due to the autoimmune destruction of pancreatic β-cells; type 2 (DM2) occurs when cells in peripheral tissues become resistant to the chemical stimulation of the insulin. In both cases, the patients have the general picture of high blood glucose (hyperglycemia). to improve or provide alternatives to the current treatments against diabetes, compounds based on metals such as vanadium have been studied and developed, due to their already recognized antidiabetic activity. Thus, in this work, vanadium compounds were synthesized using organic ligands to providing greater absorption and fewer side effects in future applications of the compounds obtained. Furthermore, the synthesized compounds were also characterized, as well as the ligands, which underwent chemical modifications. And based on the results of spectroscopy in the infrared region, as the displacements, the lower wavenumber of the sulfone group of taurine, or the intense peak referring to the stretching of the C=O bond (1668 cm-1) in the ligand T2DO (in addition to NMR data of 1H and 13C, for this ligand) corroborate with the proposed structures and with the operation of the methodologies used. The mass spectra show strong evidence for obtaining oxovanadium complexes (IV) with the suggested structures since besides being possible to verify the peak referring to the molecular ion it is also possible to predict fragmentations in the structures of the chemical species.