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.
Enamine-Iminium Ion Nazarov Cyclization of α-Ketoenones
摘要:
The mono-triflate salts of some chiral nonracemic 1,2-diamines react with alpha-ketoenones in a stoichiometric reaction to form products of the Nazarov cyclization in high enantiomeric ratios. The mechanism appears to involve rearrangement of an enamine-iminium ion.
Enamine-Iminium Ion Nazarov Cyclization of α-Ketoenones
摘要:
The mono-triflate salts of some chiral nonracemic 1,2-diamines react with alpha-ketoenones in a stoichiometric reaction to form products of the Nazarov cyclization in high enantiomeric ratios. The mechanism appears to involve rearrangement of an enamine-iminium ion.