FIELD: chemistry.
SUBSTANCE: method is carried out by treating nitromethyl-ONN-azoxy compounds of general formula (II) with a nitrating agent. The nitrating agent used is a mixture of concentrated nitric acid (HNO3) and dinitrogen tetroxide (N2O4). In formulae
and 
Z is an alkyl or N,O-containing heterocyclic radical.
EFFECT: method increases output of end products and cuts the duration of the reaction.
2 cl, 6 ex
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