In this study, we investigated the anticancer properties of methoxy-substituted nickel(II)(salophene) derivatives. We demonstrated that the most active complex [Ni-II(3-OMe-salophene)] is not necrotic in Burkitt-like lymphoma cells (BJAB) and human B-cell precursor cells (Nalm-6). [Ni-II(3-OMe-salophene)] inhibited proliferation and induced apoptosis in a concentration dependent manner, giving evidence for the involvement of CD95 receptor-mediated, extrinsic pathway. Furthermore, [Ni-II(3-OMe-salophene)] overcame vincristine drug resistance in BJAB and Nalm-6 cells.
Influence of methoxy groups on the antiproliferative effects of [FeIII(salophene-OMe)Cl] complexes
作者:Annegret Hille、Ronald Gust
DOI:10.1016/j.ejmech.2010.08.037
日期:2010.11
We synthesized methoxy-substituted iron(III)-salophene complexes ([Fe-III(OMe-salophene)Cl] with salophene = N,N'-bis(salicylidene)-1,2-phenylenediamine) and analyzed their biological activity in MCF-7 and MDA-MB-231 breast cancer as well as in HT-29 colon carcinoma cells. The results obtained in a time-dependent chemosensitivity test clearly demonstrated the correlation between the cytotoxicity of the complexes and the position of methoxy substituents in the salicylidene moieties: 3-OCH3 (4) < 5-OCH3 (8) < H (2) < 4-OCH3 (6) = 6-OCH3 (10). Compounds 6 and 10 caused cytocidal effects already at a concentration of 0.5 mu M. Both lead compound 2 and complex 8 showed similar time response curves, however, with a 5-fold lower activity compared to 6 and 10, respectively. Referring to [Fe-III(salophene)Cl] (2), methoxy substitution was accompanied with the loss of tumor cell selectivity. Moreover, the free ligands (1, 3, 5, 7, and 9) were inactive. (C) 2010 Elsevier Masson SAS. All rights reserved.
Unprecedented reductive cyclisation of salophen ligands to tetrahydroquinoxalines during metal complex formation
作者:Katie J. Lamb、Mark R. Dowsett、Michael North、Rachel R. Parker、Adrian C. Whitwood
DOI:10.1039/d0cc01192d
日期:——
The synthesis of novel tetrahydroquinoxalines by a metal induced one-electron reductive cyclisation of salophen ligands was found to occur when a salophen ligand was treated with chromium(ii) chloride or decamethylcobaltocene.
Synthesis, Characterization, and in vitro Antiproliferative Activity of [Salophene]platinum(II) Complexes
作者:Maria T. Proetto、Wukun Liu、Andrey Molchanov、William S. Sheldrick、Adelheid Hagenbach、Ulrich Abram、Ronald Gust
DOI:10.1002/cmdc.201402123
日期:2014.6
series of methoxy‐ and fluorine‐substituted [salophene]platinum(II) complexes (salophene=N,N′‐bis(salicylidene)‐1,2‐phenylenediamine) were synthesized and characterized by 1H NMR spectroscopy and mass spectrometry. The structure was confirmed on the example of [5‐OCH3‐salophene]platinum(II) (4‐Pt) by crystal structure analysis. The cytotoxicity of all complexes against MCF‐7 cells showed strong dependence