Synthesis of 3,5-Dinitropyrazole

3,5-Dinitropyrazole ammonium salt was synthesized with 3-nitropyrazole asprimary substance by nitration and rearrangement.Their structures were confirmed by IR,NMR,MS and elemental analysis.Reaction condition was optimized by HPLC and TLC.The optimization reaction temperature was 147 ℃,reaction time was 77 h and the conversion was 96.5%.Dinitropyrazole ammonium salt was directly gained by ammonia gas neutralization.