Vanadyl Binary Schiff Base Complexes Containing N<sub>2</sub>O<sub>2</sub>Coordination Sphere: Synthesis, Ab Initio Calculations and Thermodynamic Properties
作者:Mozaffar Asadi、Mohammad Hadi Ghatee、Susan Torabi、Khosro Mohammadi、Fatemeh Moosavi
DOI:10.5012/jkcs.2013.57.1.63
日期:2013.2.20
Some vanadyl complexes were synthesized by treating a methanolic solution of the appropriate Schiff base ligand and one equivalent of $VO(SO_4)_2$ to yield [($VOL_2^1-14}$)](L=Salicylaldehyde's derivatives, Schemes 1, 2). These oxovanadium (IV) complexes were characterized based on their FT-IR, UV-Vis spectroscopy and elemental analysis. The IR spectra suggest that coordination takes place through azomethine nitrogen and phenolate oxygen. In addition, the formation constants of the oxovanadium (IV) binary complexes were determined in methanolic medium. The ab initio calculations were also carried out to determine the structural and the geometrical properties of one of the complexes and its calculated vibrational frequencies were investigated.
Ligand dissociation/recoordination in fluorescent ionic zinc–salicylideneimine compounds: synthesis, characterization, photophysical properties, and 1H NMR studies
作者:Ho-Wen Chiang、Yo-Ting Su、Jing-Yun Wu
DOI:10.1039/c3dt51226f
日期:——
and 529–573 nm, respectively. Detailed 1H NMR and optical spectroscopic studies indicate the occurrence of ligand dissociation and recoordination in 1–4 in solution, leading to an equilibrium between the zinc–salicylideneimine complex species, [Zn(L)Cl2]−, and the salicylideneimine free ligand, HL. The tendency of ligand dissociation is related to the solvent, the concentration, and the substitution
一系列离子型锌-水杨亚胺化合物[HNEt 3 ] [Zn(L)Cl 2 ](L = sal H -4-CN,1 ; sal Cl -4-CN,2 ; sal Br -4-CN,3; sal OMe -4-CN,4)和[NEt 4 ] [Zn(sal H -4-CN)Cl 2 ](5),已经合成并在结构上表征。化合物1-5在两种溶液中都显示出很强的荧光带(甲醇, 甲醇; 乙腈,ACN; 二甲基亚砜, 二甲基亚砜; 二氯甲烷(DCM)和固相,最大值分别在515-560 nm和529-573 nm范围内。详细的1 H NMR和光谱研究表明,溶液中1-4中发生了配体解离和重新配位,从而导致了锌-水杨酰亚胺亚胺络合物[Zn(L)Cl 2 ] -和水杨基亚胺游离配体之间的平衡。,HL。配体解离的趋势与溶剂,水杨基环的浓度和取代有关。当溶解于非配位,极性较小的DCM溶剂中,然后配位为高极性时,配体解离的
FUSED OXAZEPINES AS INHIBITORS OF PEROXIREDOXINS
申请人:Centro Atlántico del Medicamento, SA
公开号:EP4177246A1
公开(公告)日:2023-05-10
Novel quinone-fused oxazepines compounds that inhibit peroxiredoxins, pharmaceutical compositions comprising such compounds, are disclosed. Additionally, methods of treating or alleviating conditions associated with elevated peroxiredoxins levels, and in particular cancer, are also disclosed.