ligands. The ‘symmetric’ complexes 5a and 5b were also converted to cationic cis-[PtII(NHC)2(PPh3)Cl]+Cl− complexes 8a and 8b. The structures of the ten new complexes, comprising benzylated and alkylated imidazol-2-ylidene ligands, were analysed by 1H, 13C and 195Pt NMR spectroscopy and also by X-ray diffraction for 5a, 5d, 5h, and 8a. The neutral complexes 5 were cytotoxic against a panel of seven human
提出了带有两个不同的,顺式,N-杂环卡宾(NHC)
配体的新型
铂(II)配合物的一般合成。容易获得的顺式-[Pt II(NHC)(
DMSO)]前体复合物转化为顺式-[Pt II(NHC)2 Cl 2 ]复合物(如5a和5b)或新型混合的顺式-[Pt II(NHC) )1(NHC)2 Cl 2 ]络合物,例如5c–h,是通过逐个引入单个卡宾
配体来实现的。“对称”复合体图5a和图5b也转化成阳离子顺- [
铂II(NHC)2(PPH 3)CL] +
氯-络合物图8a和8b中。通过1 H,13 C和195 Pt NMR光谱以及Xa射线衍射对5a,5d,5h和8a进行分析,分析了十种新的配合物的结构,这些配合物包括苄基化和烷基化的
咪唑-2-亚烷基
配体。中性复合物5它们对一组七个具有低微摩尔范围的IC 50值的人类癌
细胞系具有细胞毒性,而阳离子复合物8甚至达到纳摩尔IC 50值。带有天然
抗肿瘤药Combretastatin