Novel anthraquinone derivatives with redox-active functional groups capable of producing free radicals by metabolism: are free radicals essential for cytotoxicity?
The mode of action of antitumour anthraquinone derivatives (i.e. mitoxantrone) is not clearly established yet. It includes, among others, intercalation and binding to DNA, bioreduction and aerobic redox cycling. A series of anthraquinone derivatives, with potentially bioreducible groups sited in the side chain, have been synthesized and biologically evaluated. Their redox and cytotoxic activities were screened. Derivatives which bear a 2-(dimethylamino)ethylamino substituent, known to confer high DNA affinity, demonstrated cytotoxicity but not redox activity (beside the anthraquinone reduction). Conversely, derivatives which showed redox activity were not cytotoxic toward the P388 cell line. The results suggest that bioreduction is not the main mode of action in the cytotoxicity of anthraquinones. (C) 1999 Editions scientifiques et medicales Elsevier SAS.
KATZHENDLER, JEHOSHUA;GEAN, KERIA-FIORELLA;BAR-AD, GIDON;TASHMA, ZEEV;BEN+, EUR. J. MED. CHEM., 24,(1989) N, C. 23-30
Amino-anthraquinone chromophores functionalised with 3-picolyl units: structures, luminescence, DFT and their coordination chemistry with cationic Re(i) di-imine complexes
作者:Jennifer E. Jones、Benson M. Kariuki、Benjamin D. Ward、Simon J. A. Pope
DOI:10.1039/c0dt01383h
日期:——
the LUMO energy. The coordination chemistry of the ligands was probed through reaction with fac-[Re(CO)3(di-imine)(MeCN)](BF4) where di-imine = 1,10-phenanthroline (phen) and 2,9-dimethyl-1,10-phenanthroline (dmp). Combined structural and spectroscopic studies confirmed that the ligands coordinate to Re(I) exclusively via the pyridyl units, however in the case of L3 only monometallic complexes were
基于3-picolyl官能化的四个新配体的合成 氨基蒽醌(AQ)发色团通过一锅还原胺化程序进行描述,给出所需的配体L1-L4(L1,1-(3-吡啶甲基氨基)蒽-9,10-二酮; L2,1-羟基-4-(3-吡啶甲基氨基)蒽-9,10-二酮; L3,1,4-双(3-吡啶甲基氨基)蒽-9,10-二酮; L4,1,5-双(3-吡啶甲基氨基)蒽-9,10-二酮)。通过1 H和13 C 1 H} NMR在溶液中表征每种配体,其中三个实例给出了单晶X射线衍射数据。该结构证实了所提出的配方,并且还揭示了在醌和仲胺单元之间存在分子内H键。使用组合的实验/理论方法研究了配体的电子特性,结果表明,在每种情况下,可见光区域的吸收均构成了源自N的显着电荷转移(CT)特性。-(胺)-醌过渡,并且对溶剂敏感。密度泛函理论(DFT)的计算还表明,在AQ核心处氨基取代的位置会通过调制HOMO而不是LUMO能量来影响最低能量特征的波长。通过与fac-