Reprint of: Pt(II) pyridinium amidate (PYA) complexes: Preparation and in vitro anticancer activity studies
作者:Cheyenne M.A. Muller、Maria V. Babak、Mario Kubanik、Muhammad Hanif、Stephen M.F. Jamieson、Christian G. Hartinger、L. James Wright
DOI:10.1016/j.ica.2016.09.045
日期:2017.1
N[1-Alkylpyridin-4(1H)-ylidenelamides (PYAs), also known as pyridinium amidates, are a class of recently introduced ligands for transition metal ions. Herein we report the synthesis of the Pt(PYA) complexes [PtCl(DMSO)(HL)]Cl-2 (1), [Pt(CH3)(DMSO)(L)]Cl (2) and [Pt(CH3)(PPh3)(L)]Cl (3)(L =N-(1-benzylpyridin-4(1H)-ylidene)picolinamide). L and [HL](+) act as bidentate ligands coordinating through the pendant pyridine and either the amidate oxygen or nitrogen atoms to give the corresponding N,O or N, N linkage isomers. DFT calculations were carried out to determine the most energetically favorable isomeric forms of these compounds. For 1 the N,O coordination mode was lower in energy, while for 2 and 3 hardly any difference was found. In vitro cytotoxicity studies of [HL]Cl and 1 in human colorectal carcinoma HCT116, non-small cell lung carcinoma NCl-H460, and cervical carcinoma SiHa cells showed that both compounds are cytotoxic in the low mu range. (C) 2016 Elsevier B.V. All rights reserved.