FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing 5-nitro-6-(2-oxo-2R-ethyl)-1H-isoindole-1,3(2H)-diones of general formula, where R=C6H5, or 4-CH3C6H4, or 4-OCH3C6H4, or 2-thienyl, which can be used as precursors for synthesis of biologically active substances for synthesis of hexazocyclanes. Method involves treatment of substituted 4-nitro-5-(2-oxoethyl)phthalonitriles with polyphosphoric acid.
EFFECT: method enables to obtain novel compounds which contain an imide fragment.
1 cl, 4 ex
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