Conclusions
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1.
A hydroximic acid chloride, viz., 4-chloroximino-3-imidazoline 3-oxide, reacts with nitrogen-containing nucleophilic reagents to give amidoxime derivatives. The reaction with tert-butylhydroxylamine leads to an N-hydroxyamidoxime, the oxidation of which made it possible to preparatively isolate an amidoxime N-oxyl radical, viz., 4-(N-oxyl-N-tert-butylcarboxamidoximino)-1,2,2,5,5-pentamethyl-3-imidazoline 3-oxide.
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2.
Oxidation of the radical gives a nitroso nitrone, and alkylation gives only an O-alkylation product (an ether amidoxime N-oxyl), whereas the similarly constructed amidoxime reacts to give both an O-alkylation product (an ether amidoxime) and an N-alkylation product (a nitrone).
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1616–1623, July, 1985.
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Martin, V.V., Vishnivetskaya, L.A., Grigor'ev, I.A. et al. Reactions of a hydroximic acid chloride-a 3-imidazoline 3-oxide derivative-with nitrogen-containing nucleophilic reagents and preparation of stable amidoxime N-oxyl radicals. Russ Chem Bull 34, 1477–1484 (1985). https://doi.org/10.1007/BF00950152
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DOI: https://doi.org/10.1007/BF00950152