School of Chemical Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand.
Department of Chemistry, University of Sargodha, Sargodha, 40100, Pakistan.
Chem Asian J. 2019 Apr 15;14(8):1262-1270. doi: 10.1002/asia.201801798. Epub 2019 Feb 14.
Benzoylthiourea derivatives feature several donor atoms capable of coordinating to metal centers. We report here a series of Ru(η -p-cymene) complexes employing benzoylthiourea derivatives as ligands. Such ligands often coordinate to metal centers through their S and O donor atoms. We isolated complexes where the ligands were mono- or bidentately coordinated to Ru involving the S donor atom and surprisingly in bidentate coordination mode a deprotonated thiourea nitrogen resulting in a 4-membered ring structure around the metal center. DFT calculations were used to explain the differences in coordination behavior. These were complemented by stability studies and biological investigations of the compounds as anticancer agents. Several of the synthesized derivatives exhibited significant cell growth inhibitory activity, with the complexes featuring bidentate ligands being more potent than their monodentate counterparts. This can be explained by the higher stability of the former under the conditions employed in cell culture assays.
苯甲酰基硫脲衍生物具有几个能够与金属中心配位的供体原子。我们在这里报道了一系列使用苯甲酰基硫脲衍生物作为配体的 Ru(η-p-cymene)配合物。这些配体通常通过其 S 和 O 供体原子与金属中心配位。我们分离出了配合物，其中配体通过 S 供体原子单齿或双齿配位到 Ru 上，令人惊讶的是，在双齿配位模式下，硫脲氮原子被去质子化，导致金属中心周围形成一个 4 元环结构。使用 DFT 计算来解释配位行为的差异。这些配合物的稳定性研究和作为抗癌剂的生物研究得到了补充。合成的衍生物中有几个表现出显著的细胞生长抑制活性，其中具有双齿配体的配合物比其单齿配体更有效。这可以通过在前细胞培养测定中使用的条件下前者更高的稳定性来解释。
