Tripodal Half‐Sandwich Rhodium and Iridium Complexes Containing Sulfonate and Pyridinyl Entities as Antitumor Agents
作者:Andrew R. Burgoyne、Catherine H. Kaschula、M. Iqbal Parker、Gregory S. Smith
DOI:10.1002/ejic.201700704
日期:2017.12.8
against a WHCO1 oesophageal cancer cell line and the metal complexes showed moderate activity, while the uncomplexed ligands were inactive. Several of the trinuclearcomplexes are of comparable activity to that of the clinical cancer drug cisplatin. 1H NMR model studies demonstrated the in vitro DNAbinding ability of the most active complex.
鉴于广泛使用的铂类抗癌药显示出高毒性和低选择性,开发新的抗癌药的需求正在增加。这项研究调查了含有单核和三核Rh III和Ir III磺酸盐的吡啶基配合物的合成,这些配合物已使用NMR和IR光谱,HR-ESI-质谱和元素分析进行了全面表征。研究了所有磺化吡啶基化合物对WHCO1食道癌细胞系的细胞毒性,金属配合物显示中等活性,而未配合的配体则无活性。三核复合物中的几种具有与临床抗癌药顺铂相当的活性。1个1 H NMR模型研究证明了活性最高的复合物的体外DNA结合能力。
Aqueous-phase hydroformylation of 1-octene using hydrophilic sulfonate salicylaldimine dendrimers
作者:Emma B. Hager、Banothile C. E. Makhubela、Gregory S. Smith
DOI:10.1039/c2dt31471a
日期:——
Water-soluble dendritic ligands based on tris-2-(5-sulfonato salicylaldimine ethyl)amine (5) and DAB-(5-sulfonato salicylaldimine) (6) (DAB = diaminobutane) were synthesized by means of Schiff base condensation and sulfonation reactions. These dendritic ligands were fully characterized by 1H NMR, 13C NMR and FT-IR spectroscopy, elemental analysis and mass spectrometry. Dendritic ligands (5 and 6) in combination with [RhCl(COD)]2 (COD = 1,5-cyclooctadiene) were evaluated in aqueous biphasic hydroformylation of 1-octene. New water-soluble mononuclear 5-sulfonato propylsalicylaldimine Rh(I) complexes (7 and 8) were synthesized and characterized using 1H NMR, 13C NMR and FT-IR spectroscopy, elemental analysis as well as mass spectrometry. These complexes were applied as catalyst precursors in aqueous biphasic hydroformylation reactions. All the catalyst precursors were active in the hydroformylation of 1-octene under the investigated conditions. Optimal conditions were realized at 75 °C (40 bars), where the best selectivity for aldehydes was noticed. Catalyst recycling was achieved up to 5 times with minimal loss in conversion and consistent chemoselectivities and regioselectivities. Less Rh leaching was observed in the dendritic systems (5 and 6)/[RhCl(COD)]2 as compared to mononuclear catalyst precursors (7 and 8) as determined by inductively coupled plasma-mass spectrometry (ICP-MS).
Synthesis and anticancer evaluation of mono- and trinuclear half-sandwich rhodium(III) and iridium(III) complexes based on N,O -salicylaldiminato-sulfonated scaffolds
作者:Andrew R. Burgoyne、Catherine H. Kaschula、M. Iqbal Parker、Gregory S. Smith
DOI:10.1016/j.jorganchem.2017.05.058
日期:2017.10
Mononuclear and trinuclear half-sandwich Rh(III) and Ir(III) complexes based on a sulfonated scaffold have been synthesised and characterised using NMR and IR spectroscopy, mass spectrometry and elemental analysis. The cytotoxicities of the compounds were evaluated against the WHC01 oesophageal cancer cell line, with a slight increase in activity observed upon coordination of the metal.