新型偶氮-双ebselen化合物7可以通过将7-硝基-2-芳基-1,2-苯并硒代咪唑-3(2 H)-ones 3和6与苯二甲酸钠,NaTeC 6 H 5还原,并通过具有Na 2 Se 2的2-溴-3-硝基苯甲酰胺。7b的X射线结构表明该分子由于强烈的分子内次级Se···N相互作用而完全处于平面状态。与NaTeC 6 H 5进一步反应后的偶氮化合物7将其还原裂解以提供2当量的相应的芳族胺。弱的Se-N键不稳定,无法在反应条件下存活,并且在后处理中分离出二硒化物8。而偶氮二ebselens 7是的谷胱甘肽过氧化物酶(GPx)活性-enzymes的差模拟物,nitroebselens 3,6,和11B和diselenides 8分别为3-6倍依布硒啉更加活跃。基于77 Se NMR光谱,涉及硒基14的二硒化物8b的催化循环,已提出。通过化学发光测量评估,良好的GPx模拟物可以比Trolox更有效
新型偶氮-双ebselen化合物7可以通过将7-硝基-2-芳基-1,2-苯并硒代咪唑-3(2 H)-ones 3和6与苯二甲酸钠,NaTeC 6 H 5还原,并通过具有Na 2 Se 2的2-溴-3-硝基苯甲酰胺。7b的X射线结构表明该分子由于强烈的分子内次级Se···N相互作用而完全处于平面状态。与NaTeC 6 H 5进一步反应后的偶氮化合物7将其还原裂解以提供2当量的相应的芳族胺。弱的Se-N键不稳定,无法在反应条件下存活,并且在后处理中分离出二硒化物8。而偶氮二ebselens 7是的谷胱甘肽过氧化物酶(GPx)活性-enzymes的差模拟物,nitroebselens 3,6,和11B和diselenides 8分别为3-6倍依布硒啉更加活跃。基于77 Se NMR光谱,涉及硒基14的二硒化物8b的催化循环,已提出。通过化学发光测量评估,良好的GPx模拟物可以比Trolox更有效
Synthesis and Glutathione Peroxidase-Like Activities of Isoselenazolines
作者:Vijay P. Singh、Harkesh B. Singh、Ray J. Butcher
DOI:10.1002/ejoc.201100899
日期:2011.10
substitution (SNAr) reactions of N-(2-bromo-3-nitrobenzyl)aniline (18), N-(2-bromo-3-nitrobenzyl)-4-methylaniline (19) and N-(2-bromo-3-nitrobenzyl)-4-nitroaniline (20) with [nBuSeNa] afford N-[2-(butylselanyl)-3-nitrobenzyl]aniline (21), N-[2-(butylselanyl)-3-nitrobenzyl]-4-methylaniline (22) and N-[2-(butylselanyl)-3-nitrobenzyl]-4-nitroaniline (23), respectively. The bromination of 21 results in the formation
Catalyst-controlled site-selective asymmetric epoxidation of nerylamine and geranylamine derivatives
作者:Tomoya Nobuta、Takeo Kawabata
DOI:10.1039/c7cc04809b
日期:——
Novel catalysts for site- and enantioselective epoxidation of nerylamine and geranylamine derivatives have been developed. Although mCPBA oxidation took place selectively at the more electron-rich double bond to give the 6,7-epoxides, these catalysts provide the 2,3-epoxides in moderate to high enantioselectivity via the oxidation of the relatively electron-deficient double bond.
SOME DERIVATIVES OF PHENOTHIAZINE. II.<sup>1</sup>
作者:ALFRED BURGER、A. CHANDLER SCHMALZ
DOI:10.1021/jo01376a020
日期:1954.11
Nitro-, Azo-, and Amino Derivatives of Ebselen: Synthesis, Structure, and Cytoprotective Effects
作者:Vijay P. Singh、Jia-fei Poon、Jiajie Yan、Xi Lu、Marjam Karlsson Ott、Ray J. Butcher、Paul J. Gates、Lars Engman
DOI:10.1021/acs.joc.6b02418
日期:2017.1.6
Novel azo-bis-ebselen compounds 7 were prepared by reduction of 7-nitro-2-aryl-1,2-benzisoselenazol-3(2H)-ones 3 and 6 with sodium benzenetellurolate, NaTeC6H5, and by reaction of 2-bromo-3-nitrobenzamides with Na2Se2. The X-ray structure of 7b showed that the molecule, due to strong intramolecular secondary Se···N interactions, is completely planar. Azo-compounds 7 upon further reaction with NaTeC6H5
新型偶氮-双ebselen化合物7可以通过将7-硝基-2-芳基-1,2-苯并硒代咪唑-3(2 H)-ones 3和6与苯二甲酸钠,NaTeC 6 H 5还原,并通过具有Na 2 Se 2的2-溴-3-硝基苯甲酰胺。7b的X射线结构表明该分子由于强烈的分子内次级Se···N相互作用而完全处于平面状态。与NaTeC 6 H 5进一步反应后的偶氮化合物7将其还原裂解以提供2当量的相应的芳族胺。弱的Se-N键不稳定,无法在反应条件下存活,并且在后处理中分离出二硒化物8。而偶氮二ebselens 7是的谷胱甘肽过氧化物酶(GPx)活性-enzymes的差模拟物,nitroebselens 3,6,和11B和diselenides 8分别为3-6倍依布硒啉更加活跃。基于77 Se NMR光谱,涉及硒基14的二硒化物8b的催化循环,已提出。通过化学发光测量评估,良好的GPx模拟物可以比Trolox更有效
Synthesis and antioxidant activities of <i>N</i>-thiophenyl ebselenamines: a <sup>77</sup>Se{<sup>1</sup>H} NMR mechanistic study
作者:Manish Kumar、Vijay P. Singh
DOI:10.1039/d2nj01225a
日期:——
H2O2 was reported using 77Se1H} NMR spectroscopy. The synthesis of N-thiophenyl ebselenamines as well as selenenyl sulphides is described. N-Thiophenyl ebselenamines quenched lipidperoxyl radicals much more efficiently than α-tocopherol and were highly regenerable by the presence of aqueous ascorbic acid in a two-phase (chlorobenzene/water) azo-initiated peroxidation system. All novel N-thiophenyl ebselenamines
双-[2-苯基-1,2-苯并异硒唑-3( 2H )-one-7-yl]二氮烯即偶氮-双-依布硒啉在PhSH和H 2 O 2存在下的逐步氧化还原过程使用77 Se 1 H} NMR光谱报道。描述了N-苯硫基依布硒胺以及亚硒基硫化物的合成。N -Thiophenyl ebselenamines 比 α-生育酚更有效地淬灭脂质过氧自由基,并且在两相(氯苯/水)偶氮引发的过氧化系统中存在水性抗坏血酸时可高度再生。全部小说N在偶联还原酶测定中,发现与依布硒啉相比,β-噻吩依布硒胺及其相应的硒基硫化物是非常好的谷胱甘肽过氧化物酶模拟物。