- Ring-Chain Tautomerism and Reactions of a Bicyclic 1-Hydroxy-3-imidazoline-3-oxide
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The reaction of 8-hydroxy-1,4,5,7-tetramethyl-6,8-diaza-bicyclo-oct-6-en-6-oxide (1), a 2,5-bridged bicyclic 1-hydroxy-3-imidazoline-3-oxide, with NaBH4, dimetyl acetylene dicarboxylate and methylmagnesiumiodide, respectively, yields derivatives of the ring opened isomer 2.Whilst on reaction with phenylisocyanate the bicyclic structure 1 is preserved and the urethane 3 is formed.The ring-chain tautomerism of 1 is important for the application of 1 as a spin trap or radical scavenger.
- Schulz, Manfred,Moegel, Liena,Roembach, Joachim
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p. 589 - 596
(2007/10/02)
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- The Oxidative Properties of Nitroxy-radicals in Their Reactions with Sterically Hindered Hydroxylamines
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A relative scale of the oxidative properties of cyclic nitroxy-radicals has been constructed and the influence of various structural factors on the oxidising capacity of the nitroxy-group in the radicals has been investigated.It is shown that the oxidative properties of the nitroxy-group in cyclic nitroxy-radicals become more pronounced with the increase in ring size.A relation has been established between the oxidative properties and the electron-accepting properties of functional groups separated from the nitroxy-group by two and more ?-bonds.
- Dikanov, S. A.,Grigor'ev, I. A.,Volodarskii, L. B.,Tsvetkov, Yu. D.
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p. 1696 - 1699
(2007/10/02)
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