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Making organoruthenium complexes of 8-hydroxyquinolines more hydrophilic: Impact of a novel L-phenylalanine-derived arene ligand on the biological activity

Abstract

Ru(arene) compounds have many desirable features making them promising candidates for further development in anticancer drug research. While a lot of emphasis has been placed on the modification of the ancillary ligands, there are not many examples of arene ligands bearing functional groups. Herein, we report the preparation of [Ru(arene)(8-oxyquinolinato)Cl] complexes with the arene being a protected form of the amino acid L-phenylalanine and 8-oxyquinolinato ligand substituted with halogens. With this approach we aimed to alter the pharmacological properties of the complexes and address issues with the aqueous solubility of the analogous p-cymene complexes. The complexes were shown to be stable in DMSO and water and reacted readily with L-histidine and 9-ethylguanine as protein and DNA models, respectively. Assaying the antiproliferative activity in cancer cells gave IC50 values in the low μM range. While the lipophilicity of the p-cymene analogues correlated well with their in vitro cytotoxicity, the potency of the complexes with the L-phenylalanine-derived arene was independent of lipophilicity.

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Publication details

The article was received on 27 Nov 2017, accepted on 11 Jan 2018 and first published on 12 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT04451H
Citation: Dalton Trans., 2018, Accepted Manuscript
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    Making organoruthenium complexes of 8-hydroxyquinolines more hydrophilic: Impact of a novel L-phenylalanine-derived arene ligand on the biological activity

    S. Movassaghi, M. Hanif, H. Holtkamp, T. Soehnel, S. Jamieson and C. Hartinger, Dalton Trans., 2018, Accepted Manuscript , DOI: 10.1039/C7DT04451H

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