Synthesis and biological evaluation of platinum(II) complexes containing (1R,2R)-N1-alkyl-1,2-diaminocyclohexane and D-(+)-camphorate ligands
摘要:
Five platinum(II) complexes with N-monoalkyl derivatives of 1R,2R-diaminocyclohexane as ligands and D-(+)-camphorate anion as leaving group have been synthesized and characterized by elemental analysis, IR, H-1 NMR, ESI-MS, and HRMS spectra. All complexes were evaluated for their in vitro cytotoxicity against four human tumor cell lines and most of them showed promising cytotoxic activity, especially compounds 3 and 4 with branched alkyl substituent at one of nitrogen atoms. Preliminary mechanism study by flow cytometry and agarose gel electrophoresis was also carried out in comparison with cisplatin and oxaliplatin. (C) 2012 Elsevier B. V. All rights reserved.
Synthesis and antiproliferative activity of (1<i>R</i>,2<i>R</i>)-<i>N</i><sup>1</sup>-(2-butyl)-1,2-cyclohexanediamine platinum(II) complexes with malonate derivatives
Three new platinum(II) complexes of (1R,2R)-N-1-(2-butyl)-1,2-cyclohexanediamine with malonate derivatives as leaving groups have been synthesized and spectrally characterized. They were tested in vitro against four human cancer cell lines. [(1R,2R)-N-1-(2-butyl)-1,2-cyclohexanediamine-N,N '](2-ethylmalonato-O,O ')platinum(II) turned out to be more active (IC50=4.65 mu M) than oxaliplatin (IC50=6.55 mu M) against the MCF-7 cell line and is superior to its parent complex, [(1R,2R)-N-1-(2-butyl)-1,2-cyclohexanediamine-N,N '](malonato-O,O ')platinum(II). In addition, agarose gel electrophoresis study revealed that the interaction of the complex with pET22b plasmid DNA had a different behavior from that of cisplatin or oxaliplatin.