Three novel gold(III) complexes [Au(Quinpy)Cl]Cl (1), [Au(Quingly)Cl]Cl (2) and [Au(Quinala)Cl]Cl (3) [N-(8-quinolyl)pyridine-2-carboxamide = HQuinpy; N-(8-quinolyl)glycine-carboxamide = HQuingly; N-(8-quinolyl)-L-alanine-carboxamide = HQuinala] have been synthesized and characterized. The crystal structures of complexes 2 and 3 reveal that Au(III) is coordinated by three N atoms from the ligand and one Cl− anion. Complex 2 crystallized in the monoclinic system while complex 3 crystallized in the orthorhombic system. The complexes were tested against a series of tumour cell lines including B16-BL6, P388, HL-60, A-549 and BEL-7402. The data show that complex 1 is highly cytotoxic against the A-549 cells with an inhibition rate of 94.4% at a concentration of 10−6 mol L−1. Complex 3 is active against B16-BL6 with an inhibition rate of 67.52% at a concentration of 10−7 mol L−1. The interactions of complexes 1–3 with calf thymus (CT) DNA and 5′-GMP were investigated by UV-vis, fluorescence and ESMS spectroscopies. The data show that the interaction between Au(III) complexes and CT-DNA may be the intercalation effect, and complex 3 forms a 5′-GMP adduct as detected by ESMS.
三种新型
金 (III) 配合物 [Au(Quinpy)Cl]Cl (1)、[Au(Quingly)Cl]Cl (2) 和 [Au(Quinala)Cl]Cl (3) [N-(8-quinolyl)
吡啶-2-甲酰胺 = HQuinpy; N-(8-
喹啉基)甘
氨酸甲酰胺 = HQuingly; N-(8-
喹啉基)-
L-丙氨酸-甲酰胺=HQuinala]已被合成并表征。配合物 2 和 3 的晶体结构表明,Au(III) 由
配体中的三个 N 原子和一个 Cl− 阴离子配位。配合物2在单斜晶系中结晶,而配合物3在斜方晶系中结晶。该复合物针对一系列肿瘤
细胞系进行了测试,包括 B16-BL6、P388、HL-60、A-549 和 BEL-7402。数据显示,复合物1对A-549细胞具有高度细胞毒性,在10−6 mol L−1浓度下抑制率为94.4%。复合物 3 对 B16-BL6 有活性,浓度为 10−7 mol L−1 时抑制率为 67.52%。通过 UV-vis、荧光和 ESMS 光谱研究了复合物 1-3 与小牛胸腺 (CT) DNA 和 5'-GMP 的相互作用。数据表明,Au(III)配合物与CT-DNA之间的相互作用可能是嵌入效应,ESMS检测到配合物3形成5'-GMP加合物。