Major impact of N-methylation on cytotoxicity and hydrolysis of salan Ti(IV) complexes: sterics and electronics are intertwined
作者:Sigalit Meker、Cesar M. Manna、Dani Peri、Edit Y. Tshuva
DOI:10.1039/c1dt11108f
日期:——
A series of Ti(IV) complexes containing diamino bis(phenolato) “salan” type ligands with NH coordination were prepared, and their hydrolysis and cytotoxicity were analyzed and compared to the N-methylated analogues. Substituting methyl groups on the coordinative nitrogen donor of highly active and stable Ti(IV) salan complexes with H atoms has two main consequences: the hydrolysis rate increases and
制备了一系列包含具有NH配位的二氨基双(酚基)“ salan”型配体的Ti(IV)配合物,并对其水解和细胞毒性进行了分析,并与N-甲基化的类似物进行了比较。用H原子取代高活性和稳定的Ti(IV)salan配合物的配位氮供体上的甲基有两个主要结果:水解速率增加和细胞毒性活性降低。此外,用H取代Me的微小修饰会导致产生不同的主要水解产物,其中获得具有两个桥联氧代配体的双核Ti(IV)络合物,如X射线晶体学表征的,而不是三核的簇。还通过结晶学分析了包含单个氧代桥的部分水解产物。