Triarylpyridines: a versatile small molecule scaffold for G-quadruplex recognition
作者:Zoë A. E. Waller、Pravin S. Shirude、Raphaël Rodriguez、Shankar Balasubramanian
DOI:10.1039/b718854d
日期:——
The triarylpyridines are potent G-quadruplex ligands that are highly discriminating against duplex DNA and show promising selectivity between intramolecular quadruplexes.
三芳基吡啶是强效的 G-四链配体,对双链 DNA 有很强的辨别能力,并在分子内四链之间表现出良好的选择性。
Antiproliferative activity of chalcones with basic functionalities
作者:Xiaoling Liu、Mei-Lin Go
DOI:10.1016/j.bmc.2007.07.042
日期:2007.11
A library of chalcones with different basic groups were synthesized and evaluated for antiproliferative activities against the human breast cancer (MCF 7) and colon cancer (HCT 116) cell lines. Structure-activity relationships were analyzed by projection methods (PCA/PLS) and multiple linear regression. Polar volume, hydrogen bonding features, HOMO energies, and charge on the carbon were found to be important factors. A basic group on either ring A or B of the chalcone led to a favourable increase in polar Volume, but when present on ring B, it increased HOMO energies and decreased the positive charge on the carbon, both of which led to lower activity. Several examples showed that final activity of the chalcone was influenced by compensatory interactions among these parameters. In general, a single basic group on ring A was associated with good activity. A notable exception was compound 1-123 which had basic groups on both rings A and B but Still maintained a good activity profile with IC50 < 10 PM and selectivity ratios >2.5. There was some evidence to show that structural differences in chalcones influenced not only activity but mechanism of action. Compounds 6-130 and 7-140 which had basic groups on ring A interfered with cell cycle progression, but the dibasic chalcone 1-123 had no effect. (C) 2007 Elsevier Ltd. All rights reserved.
Synthesis and antimicrobial evaluation of new chalcones containing piperazine or 2,5-dichlorothiophene moiety
Two new series of chalcones have been synthesized by reacting 1-(4-piperazin-1-yl-phenyl)ethanone and 1-(2,5-dichloro-3-thienyl)-1-ethanone with different substituted benzaldehydes in turn by Claisen-Schmidt condensation. The compounds have been characterized by IR, H-1 NMR spectral and microanalysis data. All the synthesized compounds have been evaluated for antimicrobial activity. Some of these derivatives are potentially active against Gram-positive bacteria, Stophylococcus aureus and Escherichia coli while the most potent compound (1) in this study showed MIC50 value of 2.22 mu g/mL against Candida albicans. (C) 2007 Elsevier Ltd. All rights reserved.