作者:Deliang Kong、Lihua Guo、Meng Tian、Shumiao Zhang、Zhenzhen Tian、Huayun Yang、Ye Tian、Zhe Liu
DOI:10.1002/aoc.4633
日期:2019.1
F6 (Cpx = Cp*, tetramethyl(phenyl)cyclopentadienyl (Cpxph) or tetramethyl(biphenyl)cyclopentadienyl (Cpxbiph); N^N = diamine) have been synthesized and characterized. The molecular structure of 1A was determined using single‐crystal X‐ray diffraction analysis. The hydrolysis of 1A–5C was monitored using UV–visible spectra. Complexes 3A–3C showed catalytic activity for the oxidation of NADH to NAD+
十五有机金属铱(III)半夹心络合物(1A - 5C)具有通式[(η 5 -Cp X)IR(N ^ N)CL] PF 6(CP X =的Cp *,四甲基(苯基)环戊二烯基(已经合成并表征了Cp xph)或四甲基(联苯)环戊二烯基(Cp xbiph; N ^ N =二胺)。1A的分子结构使用单晶X射线衍射分析确定。1A – 5C的水解使用紫外可见光谱进行监测。配合物3A – 3C显示出将NADH氧化为NAD的催化活性+,其中3C在450分钟内显示最高的29.9营业额。在药物治疗24或48小时后,针对两种人类癌细胞系(HeLa和A549)进行了MTT分析的细胞毒性检查。该复合物显示出高效能,其中最有效的复合物(3C; IC 50 = 3.4μM)在暴露24小时后对A549细胞的活性是顺铂的六倍。随着Cp环上的苯基取代,对A549细胞的细胞毒性作用增强:Cp xbiph > Cp xph > Cp
Electrophilic RhI catalysts for arene H/D exchange in acidic media: Evidence for an electrophilic aromatic substitution mechanism
作者:Michael S. Webster-Gardiner、Paige E. Piszel、Ross Fu、Bradley A. McKeown、Robert J. Nielsen、William A. Goddard、T. Brent Gunnoe
DOI:10.1016/j.molcata.2016.07.045
日期:2017.1
of new rhodium (I) complexes supported by bidentate nitrogen-donor ligands with varying electronic and steric properties were synthesized in situ and evaluated for catalyticarene C–H/D activation. In trifluoroacetic acid (HTFA), these complexes are proposed to mediate H/D exchange of arene C–H/D bonds by an electrophilic aromatic substitution mechanism that involves Rh-mediated activation of HTFA
One‐Step Access to Heteroatom‐Functionalized Imidazol(in)ium Salts
作者:Dmitry V. Pasyukov、Maxim A. Shevchenko、Konstantin E. Shepelenko、Oleg V. Khazipov、Julia V. Burykina、Evgeniy G. Gordeev、Mikhail E. Minyaev、Victor M. Chernyshev、Valentine P. Ananikov
DOI:10.1002/anie.202116131
日期:2022.2.21
and imidazolinium salts in one step via cascade reactions of easily available 1,4-diaza-1,3-butadienes with trialkyl orthoformates and heteroatomic nucleophiles was developed. Feasibility of the new imidazol(in)ium salts for direct metallation to give M/NHC complexes (M=Pd, Ni, Cu, Ag, Au) was demonstrated.
proposed biologically active form of ruthenium is its oxidation state II other than oxidation state III, and rutheniumcomplexes offer the potential of a novel mechanism of action, reduced toxicity. Herein, three half‐sandwich RuII complexes [(η6‐p‐cym)Ru(N^N)Cl]PF6 were designed and synthesized. Lysosomes are involved in various aspects of cancer cell immortalization and cell death. Thus, lysosomes are attractive
已知拟议的钌的生物活性形式是其氧化态II,而不是氧化态III,并且钌络合物提供了一种新的作用机理和降低的毒性的潜力。这里,三个半夹心钌II络合物[(η 6 - p -cym)的Ru(N ^ N)CL] PF 6,设计并合成。溶酶体参与癌细胞永生化和细胞死亡的各个方面。因此,溶酶体是用于选择性杀死癌细胞的有吸引力的药理学靶标。我们证明Ru2可以在溶酶体中积累。此外,暴露于Ru2后,A549细胞活力仍保持在87.81%在工作浓度下持续24小时。同时,Ru2表现出较高的光稳定性和适用于长期跟踪。在暴露于A549细胞系的复合物24小时后,Ru2浓度升高,诱导了高凋亡率,细胞周期停滞,线粒体膜电位损失和活性氧超载。Ru2整合了抗癌特性和成像功能,有望被开发为双重功能的治疗剂。
Dialkyl aluminium amides: new reagents for the conversion of CO into CNR functionalities
作者:John C. Gordon、Piyush Shukla、Alan H. Cowley、Jamie N. Jones、D. Webster Keogh、Brian L. Scott
DOI:10.1039/b203693b
日期:——
A new methodology for the preparation of α-diimines and β-aminoenones has been devised and represents an alternative route to these and related nitrogenous ligands bearing highly electronegative substituents.