Syntheses of N-(2,4-Dinitrophenyl)nitroazoles

Several N-(2,4-dinitrophenyl)nitroazoles which cannot be obtained by direct nitration of N-phenylazoles have been prepared by condensation of 2,4-dinitrofluorobenzene with the appropriate nitroazoles. The structures of the products are assigned on the basis of their proton magnetic resonance spectra; in all the examples studied, condensations occur at positions remote from the nitro group of the nitroazole.