Novel metal based anti-tuberculosis agent: Synthesis, characterization, catalytic and pharmacological activities of copper complexes

Copper complexes of molecular formulae, [CuL1(OAc)], [CuL2(H2O)], [CuL3(H2O)], [CuL4(H2O)], [CuL5(H2O)] where L1–L5 represents Schiff base ligands [by the condensation of 3-hydroxyflavone with 4-aminoantipyrine (L1)/o-aminophenol (L2)/o-aminobenzoic acid (L3)/o-aminothiazole (L4)/thiosemicarbazide (L5)], have been prepared. They were characterized using analytical and spectral techniques. The DNA binding properties of copper complexes were studied using electronic absorption spectra and viscosity measurements. Superoxide dismutase and antioxidant activities of the copper complexes have also been studied. Furthermore, the copper complexes have been found to promote pUC18 DNA cleavage in the presence of oxidant. Anti-tuberculosis activity was also performed.

Graphical abstractFive 3-hydroxyflavone derivatives and their copper complexes have been synthesized and characterized. They were subjected to pharmacological studies and showed therapeutic potential.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Synthesis of 3-hydroxyflavone derivatives and their copper complexes. ► Structural characterization of the above synthesized compounds using analytical and spectral results. ► In the MIC values indicate that complexes exhibit higher antimicrobial activity than the free ligands.