Synthesis and DNA-binding properties of apoptosis-inducing cytotoxic half-sandwich rhodium(III) complexes with methyl-substituted polypyridyl ligands
作者:Yvonne Geldmacher、Riccardo Rubbiani、Pascal Wefelmeier、Aram Prokop、Ingo Ott、William S. Sheldrick
DOI:10.1016/j.jorganchem.2010.10.034
日期:2011.3
complexes 8 and 9. UV/vis, CD and NMR spectra for mixtures of complexes 7–9 with CT DNA were in accordance with intercalation of the substituted dppz ligands between the base pairs of the double helix and direct evidence for this binding mode was also provided by a 2D NOESY study for complex 7 with the hexanucleotide d(5′-CGTCGG-3′). Each of the methyl-substituted phen complexes 2–5 is significantly more
的类型的半夹心organorhodium(III)配合物[(η 5 -C 5我5)的RhCl(PP)](CF 3 SO 3)的含多吡啶配体(PP)代表有希望的类细胞生长抑制剂的。配合物的配体多吡啶更换1(PP = phen)的和6(PP = dppz)在由甲基取代的衍生物2 - 5(PP = 4- Mephen,5- Mephen,4,7--ME 2啉,5, 6-Me 2 phen)和7(pp = Me 2 dppz)导致它们对人MCF-7和HT-29癌细胞的抗增殖活性显着提高。例如,IC50朝HT-29细胞从值4.3±0.2μM为减少6至0.98±0.49μM复杂7。相比之下, HOOC和n- BuNHCO取代的dppz配合物8和9没有观察到活性(IC 50 > 100μM)。配合物7 – 9与CT DNA的混合物的UV / vis,CD和NMR光谱符合双螺旋碱基对之间取代的dppz配体