在这项研究中,生产了一系列由乙二胺四乙酸 (edta) 和二亚乙基三胺五乙酸 (dtpa) 的类似物螯合的 Ru III 配合物,并测试了 NO 清除能力。对 edta 和 dtpa 配体框架进行了修改,以改变所得 Ru III 配合物的反应性、水性稳定性和药代动力学。亚硝酰基配合物 38 的 X 射线结构证实 Ru III 配合物 27 与 NO 反应形成线性 {Ru-NO} [ 6 ] 配合物。亚硝酰基络合物 [C 1 5 H 1 5 N 4 O 1 1 Ru] 在 P2 1 /c 空间群中结晶,a = 12.731(3) A, b = 10.894(2) A, c = 14.241 (3) A , β = 107.320(4)°, V = 1885.6(7)A 3 , and Z = 4. 14 (k = 2.38×10 6 M - 1 s - 1 )和27 (k = 2)反应的动力学研究
Unusual Orthogonality in the Cleavage Process of Closely Related Chelating Protecting Groups for Carboxylic Acids by Using Different Metal Ions
作者:Stephan Mundinger、Uwe Jakob、Willi Bannwarth
DOI:10.1002/chem.201302708
日期:2014.1.27
conditions, these protectinggroups are also stable under acidic and basic conditions, allowing them to be used in combination with the ester protection of carboxylic acids. The cleavage of these protectinggroups is activated by the chelation of metal ions, involving an unusual coordination of the amide nitrogen. Despite their similarity, cleavage of these protectinggroups is possible in both a stepwise
Salpyran: A Cu(II) Selective Chelator with Therapeutic Potential
作者:Jack Devonport、Nikolett Bodnár、Andrew McGown、Mahmoud Bukar Maina、Louise C. Serpell、Csilla Kállay、John Spencer、George E. Kostakis
DOI:10.1021/acs.inorgchem.1c01912
日期:2021.10.18
methyl)phenol, Salpyran (HL). This tetradentate ligand is predicated to have suitable permeation, has an extremely high affinity for Cu compared to clioquinol (pCu7.4 = 10.65 vs 5.91), and exhibits excellent selectivity for Cu(II) over Zn(II) in aqueous media. Solid and solution studies corroborate the formation of a stable [Cu(II)L]+ monocationic species at physiological pH values (7.4). Its action
我们报告了可调 Cu(II) 螯合支架、2-(((2-((pyridin-2-ylmethyl)amino)ethyl)amino)methyl)phenol、Salpyran (HL) 的合理设计。据推测,这种四齿配体具有合适的渗透性,与氯碘羟喹相比对 Cu 具有极高的亲和力(pCu 7.4 = 10.65 vs 5.91),并且在水性介质中对 Cu(II) 的选择性优于对 Zn(II) 的选择性。固体和溶液研究证实了在生理 pH 值 (7.4)下形成了稳定的 [Cu(II)L] +单阳离子物质。其作为抗氧化剂的作用在抗坏血酸盐、tau 和人类朊病毒蛋白测定中进行了测试,结果表明Salpyran可防止二元 Cu(II)/H 2 O 2形成活性氧。 系统,展示了其作为治疗性小分子金属螯合剂的潜在用途。
A Kinetic and Structural Investigation of DNA-Based Asymmetric Catalysis Using First-Generation Ligands
作者:Fiora Rosati、Arnoldâ J. Boersma、Jaapâ E. Klijn、Auke Meetsma、Benâ L. Feringa、Gerard Roelfes
DOI:10.1002/chem.200900456
日期:2009.9.21
developed concept of DNA‐based asymmetriccatalysis involves the transfer of chirality from the DNA double helix in reactions using a noncovalently bound catalyst. To date, two generations of DNA‐based catalysts have been reported that differ in the design of the ligand for the metal. Herein we present a study of the first generation of DNA‐based catalysts, which contain ligands comprising a metal‐binding
Metal-Templated Assembly of Cyclopropane-Fused Diazepanones and Diazecanones via <i>exo</i>-<i>trig</i> Nucleophilic Cyclization of Cyclopropenes with Tethered Carbamates
作者:Vladimir A. Maslivetc、Liliya V. Frolova、Snezna Rogelj、Anna A. Maslivetc、Marina Rubina、Michael Rubin
DOI:10.1021/acs.joc.8b02062
日期:2018.11.16
A strain-release-driven, cation-templated nucleophilic 7- and 8-exo-trig-cyclization of tethered Boc-protected amines to cyclopropenes is described. The featured reaction proceeds in diastereo- and regioselective fashion and allows for preparation of the corresponding 2,5-diazabicyclo[5.1.0]octan-6-ones and 2,6-diazabicyclo[6.1.0]nonan-7-ones as sole products in high yields. Preliminary studies on
A New Robust and Versatile Tetradentate Linker for Amides To be Cleaved under Mild Conditions by Unusual Complexation of the Amide Nitrogen to Cu<sup>++</sup>
作者:Rolf A. Kramer、Manuel C. Bröhmer、Nina V. Forkel、W. Bannwarth
DOI:10.1002/ejoc.200900291
日期:2009.9
The concept of weakening amide bonds by the rather unusual forced complexation of nitrogen to Cu++ is not limited to tridentate ligands and was extended in this work to tetradentate ligands as well. The use of cyclic tetradentate ligands was to no avail, but an open-chain and more-flexible tetradentate ligand allowed mild cleavage by methanolysis after complexation. The principle was applied to the