作者:Muhammad Irshad Ali、Muhammad Khawar Rauf、Amin Badshah、Ish Kumar、Craig M. Forsyth、Peter C. Junk、Lukasz Kedzierski、Philip C. Andrews
DOI:10.1039/c3dt51382c
日期:——
In seeking new drugs for the treatment of the parasitic disease Leishmaniasis, an extensive range of organometallic antimony(V) dicarboxylates of the form [SbR3(O2CR′)2] have been synthesised, characterised and evaluated. The organometallic moieties (R) in the complexes vary in being Ph, tolyl (o, m or p), or benzyl. The carboxylates are predominantly substituted benzoates with some compounds incorporating acetato or cinnamato ligands. The crystal structures of [Sb(p-Tol)3(O2CC6H2-3,4,5-(OMe)3)2]·0.5PhMe and [SbPh3(m-CH3C6H4CH2CO2)2] were determined and shown to adopt a typical trigonal pyramidal geometry, being monomeric with a five coordinate Sb centre. In total, the biological activity of 26 Sb(V) compounds was assessed against the Leishmania major parasite, and also human fibroblast skin cells to give a measure of general toxicity. Of these, 11 compounds (predominantly substituted benzoates with m- or p-tolyl ligands) proved to be highly effective against the parasite amastigotes at concentrations of 0.5–3.5 μM, while being non-toxic towards the mammalian cells at levels below 25 μM, making them highly promising drug candidates.
在为治疗寄生虫疾病利什曼病寻找新药物的过程中,合成、表征并评估了一系列具有[SbR3(O2CR′)2]形式的金属有机锑(V)二羧酸盐。这些配合物中的金属有机部分(R)包括苯基、甲基苯基(邻、间或对位)或苄基。羧酸盐主要为取代苯甲酸盐,部分化合物包含乙酸根或肉桂酸根配体。测定了[Sb(p-Tol)3(O2CC6H2-3,4,5-(OMe)3)2]·0.5PhMe和[SbPh3(m-CH3C6H4CH2CO2)2]的晶体结构,显示它们采用典型的三角锥几何构型,为单体结构,有五配位的锑中心。总共评估了26种锑(V)化合物的生物活性,针对利什曼原虫Leishmania major以及人类成纤维皮肤细胞,以衡量其普遍毒性。其中,11种化合物(主要是含间位或对位甲基苯基配体的取代苯甲酸盐)在0.5至3.5 μM浓度下对寄生虫的无鞭毛体显示出高度效果,并且在低于25 μM的浓度下对哺乳动物细胞无毒,使其成为极具前景的药物候选物。