Progress in the Synthesis and Bioactivity of Hexacoordinate Silicon(IV) Complexes
作者:Jens Henker、Julia Wirmer‐Bartoschek、Lars Erik Bendel、Yonggang Xiang、Chen Fu、Klaus Harms、Harald Schwalbe、Eric Meggers
DOI:10.1002/ejic.201600953
日期:2016.11
(Arenediolato)bis(polypyridyl)silicon(IV) complexes contain hexacoordinate silicon and are surprisingly stable against hydrolysis in water. In an ongoing research program, we are aiming to exploit them as new structural templates for the design of bioactive compounds. As a follow-up to previous work, here we present our progress in the synthesis of hexacoordinate siliconcomplexes by selective ortho-double
(Arenediolato)双(多吡啶基)硅(IV)配合物含有六配位硅并且出人意料地在水中水解稳定。在一项正在进行的研究计划中,我们的目标是将它们用作设计生物活性化合物的新结构模板。作为先前工作的后续工作,我们在这里展示了我们通过选择性邻双硝化富电子儿茶酚配体合成六配位硅配合物的进展,然后还原为二胺并与 1,2-二酮或与醛。一些代表性复合物与 G-四链体 DNA 的结合表位由 NMR 光谱滴定确定。
Quadruplex DNA-guided ligand selection from dynamic combinatorial libraries of acylhydrazones
Dynamiccombinatoriallibraries of acylhydrazones were prepared from diacylhydrazides and several cationic or neutral aldehydes in the presence of 5-methoxyanthranilic acid catalyst. Pull-down experiments with magnetic beads functionalized with a G-quadruplex (G4)-forming oligonucleotide led to the identification of putative ligands, which were resynthesized or emulated by close structural analogues
在5-甲氧基邻氨基苯甲酸催化剂存在下,由二酰肼和几种阳离子或中性醛制备酰基的动态组合库。用形成G-四链体(G4)的寡核苷酸功能化的磁珠的下拉实验导致推定的配体的鉴定,这些配体由紧密的结构类似物重新合成或模拟。通过荧光滴定,质谱和热变性实验评估了新型衍生物的G4结合特性,从而证明了两种化合物具有强结合力(K d <10 nM)。
The discovery of pyridinium 1,2,4-triazines with enhanced performance in bioconjugation reactions
作者:Sebastian J. Siegl、Rastislav Dzijak、Arcadio Vázquez、Radek Pohl、Milan Vrabel
DOI:10.1039/c6sc05442k
日期:——
A novel class of pyridinium 1,2,4-triazines with excellent properties for use in bioconjugation reactions was discovered from a systematic kinetic study.
Hidden signatures: new reagents for developing latent fingerprints
作者:M. John Plater、Paul Barnes、Lauren K. McDonald、Sandy Wallace、Nia Archer、Thomas Gelbrich、Peter N. Horton、Michael B. Hursthouse
DOI:10.1039/b820257e
日期:——
Aldehydes substituted with a quaternised pyridinium or quinolinium ring have been investigated for the development of latent fingerprints. Two routes were developed to a novel in situ formed azacyanine dye. This dye might form in the fingerprint where reagents are concentrated but does not form appreciably in solution experiments as evidenced by the lack of an absorption band at 600 nm. N-Alkyl and N-aryl
that is amenable to use in water for self‐assembly of purely organic molecules with complex topology. In strongly acidic conditions, the dynamic nature of oxime is turned ON, allowing occurrence of error‐checking and therefore a catenane and a macrocycle self‐assembled in high yields. In neutral conditions, oxime ceases to be dynamic, which helps to trap the self‐assembled products even when the driving