Tetrahedron p. 1165 - 1172 (1985)
Update date:2022-08-31
Topics:
Couet, W. R.
Brasch, R. C.
Sosnovsky, G.
Lukszo, J.
Prakash, I.
et. al.
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-membered 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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