Bioactive half-sandwich Rh and Ir bipyridyl complexes containing artemisinin
作者:Prinessa Chellan、Vicky M. Avery、Sandra Duffy、Kirkwood M. Land、Christina C. Tam、Jong H. Kim、Luisa W. Cheng、Isolda Romero-Canelón、Peter J. Sadler
DOI:10.1016/j.jinorgbio.2021.111408
日期:2021.6
for inhibitory activity against the Plasmodium falciparum 3D7 (sensitive), Dd2 (multi-drug resistant) and NF54 late stage gametocytes (LSGNF54), the parasite strain Trichomonas vaginalis G3, as well as A2780 (human ovarian carcinoma), A549 (human alveolar adenocarcinoma), HCT116 (human colorectal carcinoma), MCF7 (human breastcancer) and PC3 (human prostatecancer) cancer cell lines. They show nanomolar
Organometallic Conjugates of the Drug Sulfadoxine for Combatting Antimicrobial Resistance
作者:Prinessa Chellan、Vicky M. Avery、Sandra Duffy、James A. Triccas、Gayathri Nagalingam、Christina Tam、Luisa W. Cheng、Jenny Liu、Kirkwood M. Land、Guy J. Clarkson、Isolda Romero‐Canelón、Peter J. Sadler
DOI:10.1002/chem.201801090
日期:2018.7.17
vaginalis. They were active in both the asexual blood stage and the sexual late stage gametocyte assays, whereas the clinical parent drug, sulfadoxine, was inactive. Five complexes were moderately active against Mycobacterium tuberculosis (IC50<6.3 μm), while sulfadoxine showed no antitubercular activity. An increase in the size of both the Cpx ligand and the aromatic imino substituent increased hydrophobicity
合成并表征了14 种新型芳烃 Ru II和环戊二烯基 (Cp x ) Rh III和 Ir III配合物,这些配合物含有用抗疟药磺胺多辛功能化的N , N '-螯合吡啶亚氨基-或喹啉亚氨基配体,其中三个通过 X 射线晶体学表征. 铑和铱复合物表现出有效的抗疟原虫活性,IC 50值为 0.10–2.0 μ m ,在所有三种恶性疟原虫测定或其中一种(3D7 氯喹敏感、Dd2 氯喹抗性和 NF54 有性晚期配子体)中,但仅适度积极向阴道毛滴虫。它们在无性血液阶段和有性晚期配子体试验中都很活跃,而临床母体药物磺胺多辛则没有活性。五种复合物对结核分枝杆菌具有中等活性(IC 50 <6.3 μ m),而磺胺多辛没有显示出抗结核活性。Cp x配体和芳香族亚氨基取代基的大小增加会增加疏水性,从而导致抗疟原虫活性增加。
Half-sandwich rhodium(III) transfer hydrogenation catalysts: Reduction of NAD+ and pyruvate, and antiproliferative activity
作者:Joan J. Soldevila-Barreda、Abraha Habtemariam、Isolda Romero-Canelón、Peter J. Sadler
DOI:10.1016/j.jinorgbio.2015.10.008
日期:2015.12
were determined to be ca. 8–10. Complexes 1–9 also catalysed the reduction of pyruvate to lactate using formate as the hydride donor. The efficiency of the transferhydrogenation reactions was highly dependent on the nature of the chelating ligand and the Cpx ring. Competition reactions between NAD+ and pyruvate for reduction by formate catalysed by 4 showed a preference for reduction of NAD+. The
Investigating the antiplasmodial activity of substituted cyclopentadienyl rhodium and iridium complexes of 2-(2-pyridyl)benzimidazole
作者:Lydia Jordaan、Malcolm T. Ndlovu、Sinethemba Mkhize、Siyabonga Ngubane、Leigh Loots、Sandra Duffy、Vicky M. Avery、Prinessa Chellan
DOI:10.1016/j.jorganchem.2022.122273
日期:2022.3
Six cationic half-sandwich Ir(III) and Rh(III) complexes (C1-C6) were synthesised by reaction of 2-(2-pyridyl)benzimidazole with the appropriate chloro-bridged dimers. All complexes were fully characterised using standard spectroscopic techniques and their purity confirmed by RP-HPLC. The molecular structures of these complexes were elucidated using single-crystal X-ray diffraction. Depending on the
通过 2-(2-吡啶基) 苯并咪唑与适当的氯桥接二聚体反应合成了六种阳离子半夹心 Ir(III) 和 Rh(III) 配合物 ( C1 - C6 )。使用标准光谱技术对所有复合物进行充分表征,并通过 RP-HPLC 确认其纯度。使用单晶 X 射线衍射阐明了这些配合物的分子结构。根据取代的环戊二烯基 ( Cp x ) 配体,配合物以斜方晶系 ( Cp x = 五甲基环戊二烯基)、单斜晶系 ( Cp x = 四甲基苯基环戊二烯基) 或三斜晶系 ( Cp x =四甲基联苯环戊二烯基)晶系。在用于体外抑制筛选的浓度范围内,所有复合物在 PBS 和 HEPES 缓冲液中都表现出良好的溶解度。使用质子核磁共振实验,在 37 °C 下监测了配合物在水中的稳定性,所有配合物均能抵抗水对其氯化物辅助配体的置换。针对 3D7 氯喹敏感和 Dd2 多药耐药恶性疟原虫菌株的体外筛选显示所有复合物均表现出中等至良好的效力。复合物C6成为