<i>C</i><sub>1</sub>-Symmetrical Titanium(IV) Complexes of Salan Ligands with Differently Substituted Aromatic Rings: Enhanced Cytotoxic Activity
作者:Hagai Glasner、Edit Y. Tshuva
DOI:10.1021/ic500001j
日期:2014.3.17
Diaminobis(phenolato) (“salan”) titanium(IV) complexes of differently substituted aromatic rings were synthesized, and their hydrolytic stability and cytotoxicity were analyzed and compared to those of the C2-symmertrical analogues and their equimolar mixtures. The hydrolytic stability of the asymmetrical complexes was in between those of the symmetrical analogues, implying an additive influence of the ligand structural
合成了不同取代的芳环的二氨基双(酚基)(“ salan”)钛(IV)配合物,并对其水解稳定性和细胞毒性进行了分析,并与C 2-对称类似物及其等摩尔混合物进行了比较。不对称复合物的水解稳定性介于对称类似物的水解稳定性之间,这暗示了配体结构参数的累加影响。相对于对称类似物及其混合物,大多数混合的卤化/硝化复合物显示出明显的细胞毒性,IC 50为值低至<1μM,相当于活性超过顺铂高达30倍。相反,具有相似性质的取代的不对称复合物揭示了两者的附加影响,并且在对称类似物之间具有细胞毒性。在假定活性物质通常是多核水解产物的前提下,总体看来,特定的配体设计和包括亲水性和疏水性在内的影响参数的微调对于最大限度地提高生物效率至关重要。