Examined the nitration of 4-nitro-N-oxide, pyridine sulfur-nitrogen mixture with a mixture of nitric acid and acetic anhydride. It was shown that sulfuric acid-nitric mixture is not capable of further nitration of 4-nitro-N-oxide pyridine. A mixture of concentrated nitric acid and acetic anhydride allows to introduce a nitro group into another derivative pyridine.
нитрование, N-окись пиридина, серно-азотные смеси, nitration, N-oxide, pyridine sulfur-nitrogen mixture
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