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Transfer hydrogenation and antiproliferative activity of tethered half-sandwich organoruthenium catalysts

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Chen, Feng, Romero-Canelón, Isolda, Soldevila-Barreda, Joan J., Song, Ji-Inn, Coverdale, James P. C., Clarkson, Guy J., Kasparkova, Jana, Habtemariam, Abraha, Wills, Martin, Brabec, Viktor and Sadler, P. J. (2018) Transfer hydrogenation and antiproliferative activity of tethered half-sandwich organoruthenium catalysts. Organometallics, 37 (10). pp. 1555-1566. doi:10.1021/acs.organomet.8b00132 ISSN 0276-7333.

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Official URL: http://dx.doi.org/10.1021/acs.organomet.8b00132

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Abstract

We report the synthesis and characterization of four neutral organometallic tethered complexes, [Ru(η6-Ph(CH2)3-ethylenediamine-N-R)Cl], where R = methanesulfonyl (Ms, 1), toluenesulfonyl (Ts, 2), 4-trifluoromethylbenzenesulfonyl (Tf, 3), and 4-nitrobenzenesulfonyl (Nb, 4), including their X-ray crystal structures. These complexes exhibit moderate antiproliferative activity toward human ovarian, lung, hepatocellular, and breast cancer cell lines. Complex 2 in particular exhibits a low cross-resistance with cisplatin. The complexes show potent catalytic activity in the transfer hydrogenation of NAD+ to NADH with formate as hydride donor in aqueous solution (310 K, pH 7). Substituents on the chelated ligand decreased the turnover frequency in the order Nb > Tf > Ts > Ms. An enhancement of antiproliferative activity (up to 22%) was observed on coadministration with nontoxic concentrations of sodium formate (0.5–2 mM). Complex 2 binds to nucleobase guanine (9-EtG), but DNA appears not to be the target, as little binding to calf thymus DNA or bacterial plasmid DNA was observed. In addition, complex 2 reacts rapidly with glutathione (GSH), which might hamper transfer hydrogenation reactions in cells. Complex 2 induced a dose-dependent G1 cell cycle arrest after 24 h exposure in A2780 human ovarian cancer cells while promoting an increase in reactive oxygen species (ROS), which is likely to contribute to its antiproliferative activity.

Item Type: Journal Article
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Science, Engineering and Medicine > Science > Chemistry
Library of Congress Subject Headings (LCSH): Organoruthenium compounds, Catalysts, Catalysis, Hydrogenation
Journal or Publication Title: Organometallics
Publisher: American Chemical Society
ISSN: 0276-7333
Official Date: 23 April 2018
Dates:
DateEvent
23 April 2018Published
16 April 2018Accepted
Volume: 37
Number: 10
Page Range: pp. 1555-1566
DOI: 10.1021/acs.organomet.8b00132
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access (Creative Commons)
Date of first compliant deposit: 9 October 2018
Date of first compliant Open Access: 9 October 2018
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
247450European Research Councilhttp://viaf.org/viaf/130022607
EP/F034210/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
UNSPECIFIEDChina Scholarship Councilhttp://dx.doi.org/10.13039/501100004543
UNSPECIFIEDBruker-Daltonik GmbH (Bremen)http://viaf.org/viaf/147613499
UNSPECIFIEDUniversity of Warwickhttp://dx.doi.org/10.13039/501100000741
17-09436SGrantová Agentura České Republikyhttp://dx.doi.org/10.13039/501100001824

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