4,6-Dinitro-5,7-diamino benzenfuroxan (CL-14) was synthesized from 2,4,6-trinitrchloroben- hzene through the process of azidcation, denitrogenation and vicarious nucleophilic substitution (VNS) reaction with total yield of 50.3%, and the structures of CL-14 and main intermediates were characterized by IR, NMR spectra and elemental analysis. The conditions of VNS reaction were optimized, and the optimal reactive conditions were obtained as follows: NH₂OH•HCl was VNS reagent, the reactive time was 6 h at 20～40 ℃, and the yield was reached to 60%. The experimental results showed that there were favorable mechanical sensitivities and thermal stability of CL-14, which friction sensitivity was better than that of DNBF. DSC and TG-DTG measurements indicated that there was only one decomposition process of CL-14 with exothermic peak temperature of 308.52 ℃.

Key words: synthesis, 4,6-dinitro-5,7-diamino benzenfuroxan, vicarious nucleophilic substitution (VNS), characterization