Diselenides and Allyl Selenides as Glutathione Peroxidase Mimetics. Remarkable Activity of Cyclic Seleninates Produced in Situ by the Oxidation of Allyl ω-Hydroxyalkyl Selenides
作者:Thomas G. Back、Ziad Moussa
DOI:10.1021/ja0357588
日期:2003.11.1
generated 1,2-oxaselenolane Se-oxide (31) in situ by a series of oxidation and [2,3]sigmatropic rearrangement steps. The remarkably active cyclic seleninate 31 proved to be the true catalyst, reacting with the thiol via a postulated mechanism in which the thioseleninate 32 is first produced, followed by further thiolysis to selenenic acid 33 and oxidation-dehydration to regenerate 31. In contrast to catalysis
Synthesis and Antiviral Activity of Oxaselenolane Nucleosides
作者:Chung K. Chu、Li Ma、Sureyya Olgen、Claire Pierra、Jinfa Du、Giuseppe Gumina、Elizabeth Gullen、Yung-Chi Cheng、Raymond F. Schinazi
DOI:10.1021/jm990113x
日期:2000.10.1
anti-HBV activities. It was of interest to obtain the enantiomericallypure isomers to determine if they have differential antiviral activities. However, due to the difficult and time-consuming nature of enantiomericsynthesis, a chiral HPLC separation was performed to obtain optical isomers from the corresponding racemic mixtures. Each pair of enantiomers of Se-ddC and Se-FddC was separated by an amylose
Synthesis and biological evaluation of new nitrogen-containing diselenides
作者:Vanessa Nascimento、Natasha L. Ferreira、Rômulo F.S. Canto、Karen L. Schott、Emily P. Waczuk、Luca Sancineto、Claudio Santi、João B.T. Rocha、Antonio L. Braga
DOI:10.1016/j.ejmech.2014.09.022
日期:2014.11
chronic human diseases. Herein, we reported the synthesis of new nitrogen-containing diselenides by a simple and efficient synthetic route. The products were obtained in good to excellent yields and their identification and characterization were achieved by NMR and HRMS techniques. The new derivatives may represent promising structures with different biological activities, which can act against oxidative
为了开发新药,已经对有机硒化合物的抗氧化特性进行了广泛研究,因为氧化应激可导致多种慢性人类疾病。在本文中,我们报道了通过简单有效的合成途径合成新的含氮二硒化物。获得的产物的收率高至优异,并且通过NMR和HRMS技术实现了它们的鉴定和表征。新的衍生物可能代表具有不同生物活性的有前途的结构,这些结构可以通过多种作用机理来抵抗氧化应激。新合成化合物的谷胱甘肽过氧化物酶样测定(GPx样活性)表明它们还原了H 2 O 2。牺牲PhSH来浇水。用二硒化物2b可获得最好的结果,二硒化物2b的活性是标准有机硒药物依布硒仑的9倍,相反,该化合物不会被肝TrxR还原。所有这些新化合物均能抑制Fe(II)诱导的TBARS。
Synthesis and characterization of (ethylenediamine)/(diammine)platinum(II) coordinated to seleno ligands containing carboxylic acid functionality
作者:Suresh M. Chopade、Prasad P. Phadnis、Amey Wadawale、Ananda S. Hodage、Vimal K. Jain
DOI:10.1016/j.ica.2012.01.055
日期:2012.4
[Pt(en)OOC(CH2)nSe}2]. These complexes were characterized by microanalyses and NMR spectroscopy (1H, 13C1H}, 77Se1H} and 195Pt1H}). The seleno ligand in [Pt(N^N)(OOC(CH2)nSe(CH2)nCOOH)][OH] is coordinated to platinum through one carboxylate group and a selenium atom. The molecular structure of [Pt(en)(OOCCH2SeCH2COOH)][OH] was established by single crystal X-ray diffraction analysis. The reactivity
In this paper, we report the synthesis and biological evaluation of picolylamide-based diselenides with the aim of developing a new series of diselenides with O···Se non-bonded interactions. The synthesis of diselenides was performed by a simple and efficient synthetic route. All the products were obtained in good yields and their structures were determined by 1H-NMR, 13C-NMR and HRMS. All these new compounds showed promising activities when tested in different antioxidant assays. These amides exhibited strong thiol peroxidase-like (TPx) activity. In fact one of the compounds showed 4.66 times higher potential than the classical standard i.e., diphenyl diselenide. The same compound significantly inhibited iron (Fe)-induced thiobarbituric acid reactive species (TBARS) production in rat’s brain homogenate. In addition, the X-ray structure of the most active compound showed non-bonded interaction between the selenium and the oxygen atom that are in close proximity and may be responsible for the increased antioxidant activity. The present study provides evidence about the possible biochemical influence of nonbonding interactions on organochalcogens potency.