化学
抗坏血酸
吡咯烷
硝基
哌啶
电子顺磁共振
有机化学
戒指(化学)
药物化学
核磁共振
食品科学
物理
作者
William Couet,Robert C. Brasch,C. Sosnovsky,Jan Lukszo,Indra Prakash,C.T. Gnewech,Thomas N. Tozer
出处
期刊:Tetrahedron
[Elsevier]
日期:1985-01-01
卷期号:41 (7): 1165-1172
被引量:86
标识
DOI:10.1016/s0040-4020(01)96516-0
摘要
The Influence of structure on the reduction of nitroxyl spin labels by ascorbic acid was examined using both piperidine and pyrrolidine nitroxyls. A five-fold molar excess of ascorbic acid and pH of 7.4 were used. The nitroxyl concentration was measured by electron spin resonance spectrometry. The five-membered (pyrrolidine) nitroxyls were more stable than the six-meabered derivatives. Ring substituents also influenced the reaction. The anionic derivatives were more stable than the unionized compounds which, in turn, were more stable than the amines (cations at pH 7.4).
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