RESUMEN
The reaction of cadmium acetate dihydrate with 2-acetyl-pyridine (4-phenyl-thio-semicarbazone) yielded the title compound, [Cd(C(14)H(13)N(4)S)(2)]. The Cd(II) atom is six-coordin-ated in a distorted octa-hedral environment by two deproton-ated thio-semicarbazone ligands acting in a tridentate chelating mode through two N and one S atoms, forming metalla-rings. In the crystal, mol-ecules are connected through inversion centers via pairs of N-Hâ¯S inter-actions, building a one-dimensional hydrogen-bonded polymer along [0-1-1].
RESUMEN
In the title compound, C(15)H(13)N(3)O(3)S, the C-S-N(H)-N linkage is non-planar, the torsion angle being -65.12â (13)° and the S atom showing a tetra-hedral environment. The compound has two almost planar fragments linked to the S atom: the isatin-derivative fragment [(C(8)H(5)NO)N-N(H)-] and the tolyl fragment [C(7)H(7)-] have maximum deviations from the mean plane through the non-H atoms of 0.0813â (13) and 0.0094â (16)â Å, respectively, and make an inter-planar angle of 80.48â (3)°. In the crystal, mol-ecules are connected into inversion dimers via pairs of N-Hâ¯O hydrogen bonds. Additionally, the mol-ecular structure is stabilized by an intra-molecular N-Hâ¯O hydrogen bond.
RESUMEN
AIMS: Several lines of evidence support the hypotheses that the oxidation of low density lipoprotein (LDL) may play a crucial role in the initiation and progression of atherosclerosis. Oxidative stress is one of the causes of the overproduction of reactive species that increase the formation of oxidized LDL. Thiosemicarbazones are compounds used in anticancer, antiviral and antifungal therapy; however, its redox activity has been controversial. Thus, we tested, in vitro, a possible antioxidant activity of a thiosemicarbazone derivate, the isatin-3-N(4)-benzilthiosemicarbazone (IBTC). MAIN METHODS: We measured the conjugated diene formation in serum and LDL as well as the loss of tryptophan fluorescence in LDL induced by two oxidant agents, 2,2-azobis(2-amidinopropane dihydrochloride) (AAPH) and Cu(2+). Thiobarbituric acid reactive substances (TBARS) formation in LDL and in different rat tissues was also assessed. The toxicity of IBTC was measured using aortic slices viability assay. KEY FINDINGS: Our results show that IBTC significantly reduced the AAPH and Cu(2+)-induced formation of conjugated dienes, increased in a dose-dependent manner the lag phase and the t(1/2) of tryptophan fluorescence, and reduced the TBARS formation in LDL, plasma and rat tissues, showing no toxicity to aortic slices. SIGNIFICANCE: These results indicate that IBTC is a good antioxidant and a promising antiatherogenic agent for further studies in vivo.