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Nucleophilic Substitution in the Furazan Series. Reactions with O-Nucleophiles.-Nitrofurazans serve as excellent synthons in the preparation of hydroxyfurazans as well as furazanyl ethers. Hydroxylation of nitrofurazans is smoothly achieved on reaction with NaOH. It is shown that the selective substitution of one nitro group in dinitrofurazan (VII) and dinitro(aza)difurazan analogues is difficult to achieve and is accompanied by disubstitution as well as formation of difurazanyl ethers [cf. (X)]. Reaction of nitrofurazans with alcoholates (III) or phenolates (V) provides access to a wide range of furazanyl ethers (IV) and (VI), respectively. -(SHEREMETEV, A. B.; KHARITONOVA, O. V.; MANTSEVA, E. V.; KULAGINA, V. O.; SHATUNOVA, E. V.; ALEKSANDROVA, N. S.; MEL'NIKOVA, T. M.; IVANOVA, E. A.; DMITRIEV, D. E.; EMAN, V.; ET AL.; Russ. J. Org.

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