Synthesis of 3-(3,5-dinitropyrazol-4-yl)-4-nitrofurazan and its salts

The annulation reaction of vinamidinium salt containing nitrofurazanyl moiety at the beta-position gives access to the corresponding pyrazole. At nitration, two nitro groups were installed to the pyrazole ring. The synthesized 3-(3,5-dinitropyrazol-4-yl)-4-nitrofurazan 13 is strong NH acid and a new family energetic salts was prepared by direct neutralization with high nitrogen bases. Compound 13 crystallizes in the monoclinic space group P21/c, and charaterized by high density of 1.979 g/cm3 (at 100 K). J. Heterocyclic Chem., (2012).