cholesterol-based α-phenyl-N-tert-butyl nitrone derivatives were synthesized as antioxidants against light-induced retinal degeneration. Whereas nitrone 10 significantly protected retina against bright fluorescent light exposure when injected into the vitreous at 1 mM, no protection was observed with nitrone6. The parent compound α-phenyl-N-tert-butyl nitrone also exhibited protective activity at 9 mM
Novel ampiphilic derivatives of alpha-c-phenyl-n-tert-butyl nitrone
申请人:Durand Gregory
公开号:US20060120985A1
公开(公告)日:2006-06-08
Novel compounds, derivatives of α-C-phenylN-tert-butyl nitrone, a method for production and use thereof for the preparation of medicaments for the prevention or treatment of diseases related to oxidative stress.
NOVEL AMPHIPHILIC DERIVATIVES OF ALPHA-C-PHENYL-N-TERT-BUTYLNITRONE
申请人:Durand Grégory
公开号:US20090306001A1
公开(公告)日:2009-12-10
Compounds derived from α-C-phenyl-N-tert-butylnitrone, a process for the preparation thereof and use thereof for the preparation of medicaments for use in preventing or treating oxidative stress-related diseases.
In this study we report the synthesis of a series of new amphiphilic compounds derived from alpha-phenyl-N-tert-butylnitrone (PBN). The nitrone function was fitted into the core of the molecule between its polar and apolar groups. The polar head consisted of a lactobionamide, an ammonium, or a carboxylate group. The hydrophobic part consisted of a hydro- or a perfluorocarbon chain. The hydrophobic
Reactivities of Substituted α-Phenyl-<i>N</i>-<i>tert</i>-butyl Nitrones
作者:Marie Rosselin、Fanny Choteau、Kamal Zéamari、Kevin M. Nash、Amlan Das、Robert Lauricella、Elisabeth Lojou、Béatrice Tuccio、Frederick A. Villamena、Grégory Durand
DOI:10.1021/jo501121g
日期:2014.7.18
α-phenyl-N-tert-butyl nitrones bearing one, two, or three substituents on the tert-butyl group was synthesized. Cyclic voltammetry (CV) was used to investigate their electrochemical properties and showed a more pronounced substituent effect for oxidation than for reduction. Rate constants of superoxide radical (O2•–) reactions with nitrones were determined using a UV–vis stopped-flow method, and phenylradical (Ph•)
在这项工作中,一系列的α苯基ñ -叔丁基硝酮轴承,对一个,两个,或三个取代基叔丁基组的合成。循环伏安法 (CV) 用于研究它们的电化学性质,并显示出比还原更显着的氧化取代基效应。超氧自由基 (O 2 •– ) 与硝酮反应的速率常数使用紫外-可见光停流法测定,苯基自由基 (Ph • ) 捕获速率常数由 EPR 光谱测量。的效果ñ -叔-丁基取代对硝酰基碳的电荷密度和电子密度局部化以及硝酮与 O 2 •–和 HO 2 •反应的自由能在 PCM/B3LYP/6-31+G** 上进行了计算合理化//B3LYP/6-31G* 理论水平。理论和实验数据表明,反应速率与硝酰基碳电荷密度相关,表明 O 2 •–和 Ph •具有亲核性质除了硝酰基碳原子。最后,在暴露于过氧化氢的细胞培养物中研究了取代效应,并观察了细胞活力与硝酮氧化电位之间的相关性。通过结合计算方法和实验方法,人们提出了对自由基与硝酮衍生物反应性的新见解。