Synthesis and characterization of 2,7-bis(2-pyridyl)-1,8-diazaanthraquinone — A redox-active ligand designed for the construction of supramolecular grids
In search of safe and effective anti-Alzheimer disease agents a series of gallocyanine dyes have been synthesized and evaluated for their ability to inhibit LRPs/DKK1 interactions. Modulation of the interactions between LRPS and DKK1, regulate Wnt signaling pathway and affect Tau phosphorylation. The current efforts resulted in the identification of potent DKK1 inhibitors which are able to inhibit
Zehn 2-(phenoxyphenyl)indole und vier 2-(Phenoxyphenyl)-1-benzofurane mit endständigen Amidinium- oder Imidazolinium-Gruppen wurden im Hinblick auf wachstumshemmende Eigenschaften synthetisiert.
Synthesis and Characterization of New Light Emitter Symmetrical Phenoxazinium Salt and Its Potential Application as Sensor for Assessment of Hg2+
作者:M. S. Attia、A. O. Youssef、Abdel-Sattar S. H. Elgazwy、Samia A. El Abady、Samia M. Agami、Safaa I. Elewa
DOI:10.1007/s10895-014-1349-4
日期:——
The sensitization of the excited triplet state of a novel symmetrical Bis(dialkylamino)phenoxazinium salt was developed in the presence of Hg2+. This effect was used to determine the concentration of Hg2+ in different water samples. The phenoxazinium salt sensor was characterized by different spectroscopic tools such as: UV, FTIR, NMR and fluorescence spectra. The sensor has an emission band at 347 nm in DMSO. Hg2+ in DMSO at pH 5.6 can remarkably quench the fluorescence intensity of the sensor at 347 nm and a new band was appeared at 436 nm due to the strong complex formation between Hg2+ and sensor. The quenching of the band intensity at 347 and the enhancement of the intensity of the new band at 436 were used to determine the Hg2+ in different waste water samples. The dynamic range found for the determination of Hg2+ concentration is 8.7 × 10-10 – 1.4 × 10-6 mol L−1 with a detection limit of 5.8 × 10−10 mol L−1 and quantification detection limit of 1.8 × 10-9 mol L-1.
Synthesis of Fluorinated Amide Derivatives via a Radical N-Perfluoroalkylation–Defluorination Pathway
作者:Zhiyao Zheng、Angela van der Werf、Marie Deliaval、Nicklas Selander
DOI:10.1021/acs.orglett.0c00768
日期:2020.4.3
A one-pot approach to fluorinated hydroxamic acid, amide, and thioamide derivatives is reported. The reaction proceeds via an N-perfluoroalkylation of nitrosoarenes with perfluoroalkanesulfinates, resulting in labile N-perfluoroalkylated hydroxylamines. By the addition of suitable additives, a controllable oxy/thiodefluorination of the fluorinated hydroxylamine intermediates was achieved. The method
gallocyanine derivatives was synthesized with modifications of the substituent groups in position 1, 2 and 4 of the phenoxazinone scaffold. The effectiveness of gallocyanines to inhibit DKK1/LRP6 interactions and Tau phosphorylation induced by prostaglandin J2 and DKK1 was elucidated by both experimental data and molecular docking simulations. Bis-alkylated with flexible alkyl estergroups on C1 and bis-benzyl