New dicationic derivatives of dibenzotetraaza[14]annulene: tuning DNA-binding properties
作者:Dariusz Pawlica、Marijana Radić-Stojković、Łukasz Dudek、Ivo Piantanida、Lesław Sieroń、Julita Eilmes
DOI:10.1016/j.tet.2009.03.030
日期:2009.5
Four new water-soluble derivatives of dibenzotetraaza[14]annulene have been synthesized, bearing meso substituents with different structures and dimensions: 3-(N,N,N-trimethylammonium)propyl, 3-(N-pyridinium-1-yl)propyl, 2-[3-(N,N,N-trimethylammonium)propoxy]benzoyl, and 2-[3-(N-pyridinium-1-yl)propoxy]benzoyl. The crystal structures of 3-(trimethylammonium)propyl and (N,N,N-trimethylammonium) propoxy]benzoyl d erivatives were determined by single crystal X-ray analysis. According to the UV-vis titrations, thermal denaturation experiments, and ethidium bromide displacement assays, all compounds presented here interact strongly with double Stranded (ct)-DNA. The product equipped with 3-(trimethylammonium)propyl pendant groups and two positive charges interacts with DNA in one dominant binding mode, whereas the other three derivatives revealed More complex mixed-type interactions. The results have been discussed in terms of dimensions, geometry, and electronic Properties of the evaluated compounds, on the basis of corresponding crystallographic data. (C) 2009 Elsevier Ltd. All rights reserved.