Effect of substitution at N″-position of N′-hydroxy-N-amino guanidines on tumor cell growth
摘要:
Structural modification of one of our earlier reported lead molecule (ABNM13) has been carried out to study the effect of different substituents at the N ''-position of N-hydroxy-N'-amino guanidines (HAGs) on their anticancer activity. Compounds with electron donating substituents were found to be less active. In contrast, those with electron withdrawing groups were found favorable for anticancer activity. The obtained results provide significant SAR information that may be useful for further drug designing with HAGs. (c) 2012 Elsevier Ltd. All rights reserved.
Effect of substitution at N″-position of N′-hydroxy-N-amino guanidines on tumor cell growth
摘要:
Structural modification of one of our earlier reported lead molecule (ABNM13) has been carried out to study the effect of different substituents at the N ''-position of N-hydroxy-N'-amino guanidines (HAGs) on their anticancer activity. Compounds with electron donating substituents were found to be less active. In contrast, those with electron withdrawing groups were found favorable for anticancer activity. The obtained results provide significant SAR information that may be useful for further drug designing with HAGs. (c) 2012 Elsevier Ltd. All rights reserved.
Microwave synthesis of mixed ligand diimine–thiosemicarbazone complexes of ruthenium(ii): biophysical reactivity and cytotoxicity
作者:Floyd A. Beckford、Michael Shaloski, Jr.、Gabriel Leblanc、Jeffrey Thessing、Lesley C. Lewis-Alleyne、Alvin A. Holder、Liya Li、Navindra P. Seeram
DOI:10.1039/b915081a
日期:——
are best formulated as [(phen)(2)Ru(thiosemicarbazone)](PF(6))(2) and [(phen)(2)Ru(thiosemicarbazone)](PF(6))(2) where thiosemicarbazone = 9-anthraldehydethiosemicarbazone, 9-anthraldehyde-N(4)-methylthiosemicarbazone, and 9-anthraldehyde-N(4)-ethylthiosemicarbazone. Fluorescence competition studies with ethidium bromide, along with viscometric measurements suggests that the complexes bind calf thymus
Novel microwave synthesis of half-sandwich [(η<sup>6</sup>
-C<sub>6</sub>
H<sub>6</sub>
)Ru] complexes and an evaluation of the biological activity and biochemical reactivity
作者:Floyd A. Beckford、Alyssa Stott、Antonio Gonzalez-Sarrías、Navindra P. Seeram
DOI:10.1002/aoc.3007
日期:2013.7
We have used a novelmicrowave‐assisted method to synthesize a pair of half‐sandwich ruthenium–arene–thiosemicarbazone complexes of the type [(η6‐C6H6Ru(TSC)Cl]PF6. The thiosemicarbazone (TSC) ligands are 2‐(anthracen‐9‐ylmethylene)hydrazinecarbothioamide and 2‐(anthracen‐9‐ylmethylene)‐N‐ethylhydrazinecarbothioamide derived from 9‐anthraldehyde. The complexes are moderately strong binders of DNA,
Cytotoxic gallium complexes containing thiosemicarbazones derived from 9-anthraldehyde: Molecular docking with biomolecules
作者:Floyd A. Beckford、Alyssa Brock、Antonio Gonzalez-Sarrías、Navindra P. Seeram
DOI:10.1016/j.molstruc.2016.05.075
日期:2016.10
We have synthesized a trio of gallium complexes bearing 9-anthraldehyde thiosemicarbazones. The complexes were assessed for their anticancer activity and their biophysical reactivity was also investigated. The three complexes displayed good cytotoxic profiles against two human colon cancer cell lines, HCT-116 and Caco-2. The IC50 ranged from 4.7 - 44.1 μM with the complex having an unsubstituted amino
Abstract New emissive Pd(II) complexes with anthracene-based thiosemicarbazones have been readily prepared in high yields. X-ray crystallographic analysis reveals that N(4)-substituted groups of thiosemicarbazone ligands exert marked effect on coordinationmode of Pd(II) central ion. Rare asymmetric chelation based on monothiosemicarbazone is found with small N(4)-substituted groups such as methyl
Four new Ni(II) complexes were obtained from the reaction between anthracene-based thiosemicarbazones and inorganic metal salt. Structural investigation of the complexes using X-ray crystallography reveals unusual cis geometries driven by intramolecular pi-pi stackings between anthracenyl rings. Due to the novel interactions, the anthracenyl protons H-1,H-8,H-2,H-7 are not observed and the imine proton is largely shifted in H-1 NMR spectra. The UV-Vis and photoluminescent data clearly indicate strong perturbation of intramolecular pi-pi stackings on electronic structure of anthracenyl cores, namely broadening of absorption and emission bands.