A fused, tricyclic pyridine-based energetic material, 4-amino-5-nitro-[1,2,5]oxadiazolo[3,4-e]tetrazolo[1,5-a]pyridine-3-oxide (ANTP), was first synthesized through a two-step reaction from commercially available reagents with a total yield of 75%, namely the azidonation of 4-amino-2,6-dichloro-3,5-dinitropyridine with nitrogen elimination and ring closure, followed by another azidonation and azido–tetrazolo tautomerism. Its structure was determined by single X-ray diffraction. The crystal of ANTP is orthorhombic, with space group P2₁2₁2₁ with crystal parameters of a = 8.9130(18) Å, b = 14.057(3) Å, c = 6.5730(13) Å, V = 823.5(3) ų, and Z = 4, F(000) = 480. It exhibits a surprisingly high density (1.92 g cm⁻³ at 293 K), low thermal stability, a positive heat of formation and good detonation properties.

中文翻译：

---

稠合的，基于三环吡啶的高能材料的合成和热行为：4-氨基-5-硝基-[1,2,5]恶二唑并[3,4- e ]四唑[1,5- a ]吡啶- 3-氧化物†

稠合的，基于三环吡啶的高能材料4-氨基-5-硝基-[1,2,5]恶二唑并[3,4- e ]四唑并[1,5 - a ]吡啶-3-氧化物（ANTP），首先由市售试剂通过两步反应合成，总产率为75％，即4-氨基-2,6-二氯-3,5-二硝基吡啶在氮消除和闭环的作用下进行叠氮化，然后再进行叠氮和叠氮四唑互变异构。其结构通过单X射线衍射确定。ANTP晶体为正交晶体，空间群为P 2 ₁ 2 ₁ 2 _{1 1}，晶体参数为a = 8.9130（18）Å，b= 14.057（3）埃，c ^ = 6.5730（13）A，V = 823.5（3）³，和Ž = 4，˚F（000）= 480。其表现出令人惊奇的高密度（1.92克厘米^-3在293 K），低热稳定性，正形成热和良好的爆震性能。