Gold(I) complexes of imidazole and thiazole-based diphos type ligands were prepared and their potential as chemotherapeutics investigated. Depending on the ligands employed and the reaction conditions complexes [L(AuCl)2] and [L2Au]X (X = Cl, PF6) are obtained. The ligands used are diphosphanes with azoyl substituents R2P(CH2)2PR2 R = 1-methylimidazol-2-yl (1), 1-methylbenzimidazol-2-yl (4), thiazol-2-yl (5) and benzthiazol-2-yl (6)} as well as the novel ligands RPhP(CH2)2PRPh R = 1-methylimidazol-2-yl (3)} and R2P(CH2)3PR2 R = 1-methylimidazol-2-yl (2)}. The cytotoxic activity of the complexes was assessed against three human cancer cell lines and a rat hepatoma cell line and correlated to the lipophilicity of the compounds. The tetrahedral gold complexes [(3)2Au]PF6 and [(5)2Au]PF6 with intermediate lipophilicity (logD7.4 = 0.21 and 0.25) showed significant cytotoxic activity in different cell lines. Both compounds induce apoptosis and inhibit the enzymes thioredoxin reductase and glutathione reductase.
研究人员制备了
咪唑和
噻唑二
磷配体的
金(I)配合物,并对其作为化疗药物的潜力进行了研究。根据所用
配体和反应条件的不同,可以得到[L(AuCl)2]和[
L2Au]X(X = Cl,PF6)配合物。使用的
配体是带有偶氮取代基 R2P(
CH2)2PR2 R = 1-甲基
咪唑-2-基(1),
1-甲基苯并咪唑-2-基(4)、
噻唑-2-基 (5) 和
苯并噻唑-2-基 (6)} 以及新型
配体 RPhP( )2PRPh R = 1-甲基
咪唑-2-基 (3)} 和 R2P( )3PR2 R = 1-甲基
咪唑-2-基 (2)}。评估了这些配合物对三种人类癌
细胞系和一种大鼠肝癌
细胞系的细胞毒性活性,并将其与化合物的亲脂性联系起来。具有中等亲油性(logD7.4 = 0.21 和 0.25)的四面体
金配合物 [(3)2Au]PF6 和 [(5)2Au]PF6 在不同
细胞系中显示出显著的细胞毒性活性。这两种化合物都能诱导细胞凋亡并抑制
硫代氧化还原酶和
谷胱甘肽还原酶。