reactions we have synthesised a series of star- and banana-shapedoligomers with a pyrimidine unit as the central core and π-conjugated arms consisting of aromatics bearing electron-donor substituents. The position of the arms as well as the nature of their substituents were investigated with a view to accessing compounds that exhibit interesting light-emittingproperties. The best fluorescence quantum yields
Structure-Activity Relationship Studies of CNS Agents, Part 25: 4,6-Di(heteroaryl)-2-(N-methylpiperazino)pyrimidines as New, Potent 5-HT2A Receptor Ligands: A Verification of the Topographic Model
作者:Maria J. Mokrosz、Lucjan Strekowski、Wei Xing Kozak、Beata Duszyńska、Andrzej J. Bojarski、Aleksandra Kłodzinska、Agnieszka Czarny、Marek T. Cegła、Anna Dereń-Wesołek、Ewa Chojnacka-Wójcik、Stefan Dove、Jerzy L. Mokrosz
DOI:10.1002/ardp.19953280906
日期:——
A series of new 4,6‐di(heteroaryl)pyrimidines containing an N‐methylpiperazino group (6–13) or an ethylenediamine chain (15–20) in position 2 were synthesized and their 5‐HT1A and 5‐HT2A receptor affinities were determined. It was shown that the substituent effects on the 5‐HT2A affinity are additive and could be described quantitatively. In a behavioral model it was also demonstrated that 6–11 are
Chiral discrimination in binding of enantiomers of 2-(aminoalkoxy)-substituted 4-(2-thienyl)pyrimidines and 4,6-bis(2-thienyl)pyrimidines with duplex DNA
作者:Lucjan Strekowski、Marek T. Cegla、Vidya Honkan、Henryk Buczak、W. Rucks Winkeljohn、Alfons L. Baumstark、W. David Wilson
DOI:10.1016/j.bmcl.2005.04.004
日期:2005.6
Thienylpyrimidines substituted at position 2 of the pyrimidine with a chiral aminoalkoxy group were synthesized. Upon interaction with duplex DNA, the unfused heteroaromatic system of these compounds intercalates with DNA base pairs and the protonated side chain is located in the major groove. The S-enantiomers bind more strongly than their R-counterparts with enantiomeric discrimination, as measured by a ratio of binding constants K-S/K-R, ranging from 1.2 to 2.4. (c) 2005 Elsevier Ltd. All rights reserved.
Quantitative structure-activity relationship analysis of cation-substituted polyaromatic compounds as potentiators (amplifiers) of bleomycin-mediated degradation of DNA
作者:Lucjan Strekowski、W. David Wilson、Jerzy L. Mokrosz、Maria J. Mokrosz、Donald B. Harden、Farial A. Tanious、Roman L. Wydra、Sidney A. Crow
DOI:10.1021/jm00106a017
日期:1991.2
A set of 21 polyheteroaromatic compounds substituted with flexible cationic groups and of similar molecular size has been analyzed for binding with DNA and for effects on the bleomycin-mediated degradation of the DNA double helix. Increases in apparent rates of the DNA digestion were observed in all cases under the experimental conditions of noncompetitive binding of these compounds and bleomycin to DNA. Surprisingly, the quantitative structure-activity relationship analysis revealed two distinct correlations despite close structural similarities for the set of bleomycin amplifiers. These unusual results are explained in terms of the formation of two stereochemically different ternary complexes of activated bleomycin-DNA-amplifier. The relevance of this finding for the design of new bleomycin amplifiers is discussed.