Preparation method of fused ring amphoteric energetic compound cationic salt for ring breaking and reconstruction of pyrimidine
Through the pyrimidine ring-breaking reconstruction method, a cationic salt of 3-amino-6-hydrazine-7-nitropyrazolo[1,2,4]triazole fused ring-containing compound with acidic and basic properties was synthesized, solving the problem that most existing energy-containing materials are single-property salts, and achieving amphoteric energy-containing compounds with high density, excellent detonation performance and good stability.
Patent Information
- Application Number
- CN202510353149.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-25
- Publication Date
- 2025-06-27
AI Technical Summary
Most existing energy-containing materials can only form cationic or anionic salts of a single property, and lack amphoteric energy-containing compounds, which limits the richness and regulation of their energy structure and properties.
Through the pyrimidine ring-breaking reconstruction method, a cationic salt of a 3-amino-6-hydrazine-7-nitropyrazolo[1,2,4]triazole fused ring energy compound with both acidic and basic properties was designed and synthesized. The anionic salt and cationic salt of the compound were successfully synthesized by the combination of the new n-heterocyclic structure and energy groups through the green synthesis method and the regulation of sensitivity and stability.
It has achieved the preparation of high-density amphoteric energy-containing compounds, with excellent detonation performance, good thermodynamic stability and adjustable oxygen balance, and has wide application potential in the fields of national defense science and technology, aerospace and civil engineering.
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Abstract
Description
Technical Field
[0001] The present invention relates to a preparation method of a pyrimidine-ring-breaking and ring-reconstructing fused-ring amphoteric energetic compound cation salt, and particularly relates to a preparation method of a 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound cation salt having both acidic and basic properties, belonging to the technical field of energetic materials. Background Art
[0002] Energetic materials refer to substances that can undergo intense redox reactions by themselves and release a large amount of energy (usually accompanied by a large amount of gas and heat) under the stimulation of a certain external energy. The increase in the energy of energetic materials is often accompanied by a decrease in their stability. Salt formation is considered an effective strategy to balance energy and stability. The most representative is TKX-50, which not only has high energy but also has good stability and has great application value. However, most energetic molecules can only form cationic or anionic salts. For example, the precursor of TKX-50 is BTO. TATOT can also only react with acids to form cationic salts. Amphoteric energetic compounds have both acidic and basic properties and can simultaneously become anionic and cationic salts, which can not only effectively enrich their energy structure but also further adjust their properties. However, only a very small number of energetic compounds exhibit amphoteric properties.
[0003] In biochemistry, the amphoteric properties of amino acids and proteins are crucial for maintaining the pH balance of organisms. In industrial chemistry, amphoteric compounds are used as catalysts, buffers, and surfactants. In the pharmaceutical field, they can be used for drug design and protein purification. Amphoteric compounds can also be applied to probe molecules and also have functions such as catalysis. Due to their unique chemical properties, amphoteric compounds have a wide range of applications in multiple fields. Although a series of important progress has been made in the field of energetic materials for amphoteric energetic compounds in recent years, the research on amphoteric energetic compounds is still in its infancy. Currently, several amphoteric energetic compounds have been successfully synthesized, such as FOX-7 (1,1-diamino-2,2-dinitroethylene) and its derivatives. However, the molecular structures of these compounds show significant diversity, and the combination of their skeletons and functional groups lacks regularity, which poses great challenges to the systematic research and performance optimization of amphoteric energetic compounds. But their structures show different skeletons and functional groups, and there is a lack of regularity in the structure. Currently, the traditional methods for synthesizing amphoteric energetic compounds are as follows: First, construct the skeleton, and introduce amphoteric groups on the basis of the skeleton, such as acidic groups: carboxyl -COOH, phenolic hydroxyl -OH, sulfonamide group -SO2NH2, etc., and basic groups: amino -NH2, imino -RNH, guanidine group -CN3H4, etc. Since the structure of energetic amphoteric compounds contains both acidic and basic groups but has very different properties, relatively complex synthetic routes or harsh reaction conditions are often required, resulting in long synthesis steps and low efficiency.
[0004] The pyridazine ring undergoes a reduction ring - contraction reaction using Zn / TFA to transform into pyrrole. Inspired by the ring transformation for constructing new compounds, the ring - breaking and reconstruction of pyrimidine to form amphoteric energetic compounds were studied. The nitrogen - containing heterocyclic structure is the main backbone unit of current energetic materials. In addition to having a high heat of formation, this five - membered ring structure of heterocyclic azoles also has high ring strain, strong aromaticity, and the property of easily forming hydrogen bonds and coordination bonds within the crystal. These properties make them very effective structural units for designing and synthesizing new nitrogen - rich heterocyclic energetic compounds. Currently, nitrogen - rich heterocyclic energetic compounds mainly include azoles and diazines. The pyrimidine heterocycle is the most common diazine, and pyrazole is the most common diazole. Diverse pyrazoles can be obtained by utilizing the unique chemical properties of pyrimidine. An effective method for converting pyrimidine into pyrazole would be valuable. We aim to construct new fused - ring amphoteric energetic compounds by simply controlling the reaction materials, reaction temperature, and reaction time through ring changes, thereby further improving the density and corresponding detonation performance of energetic materials. Energetic cations have evolved from simple linear structures to complex n - heterocyclic structures, and the energy characteristics of energetic salts have been significantly enhanced by introducing various energy groups. However, the development of energetic cations still faces limiting factors such as synthesis difficulty, thermal stability, sensitivity control, and cost. The generation of the cation salt of 3 - amino - 6 - hydrazino - 7 - nitropyrazolo[1,2,4]triazole fused - ring energetic compound is expected to further promote the performance improvement and application expansion of energetic cation salts through the design of a new n - heterocyclic structure, the optimized combination of energy groups, the development of green synthesis methods, and the regulation of sensitivity and stability. Its unique molecular topological structure endows it with excellent thermodynamic stability (ΔHf>400kJ / mol), high energy density (ρ>1.90g / cm 3 ) and adjustable oxygen balance (OB≈0). These characteristics enable it to exhibit significant application potential in fields such as national defense technology (e.g., high - energy explosives, solid propellants), aerospace (space propulsion systems), and civil engineering (safety blasting, special welding). In - depth research on such compounds will promote the precise design and performance regulation of energetic materials at the molecular level, provide a theoretical basis and technical support for the development of a new generation of high - energy - density materials, and thus promote the leap - forward development of energetic material science. Summary of the Invention
[0005] The object of the present invention is to provide a preparation method of a pyrimidine-ring-breaking and ring-reconstructing fused-ring amphoteric energetic compound cation salt; by using the transformation of the ring to construct a new compound, a pyrimidine-ring-breaking and ring-reconstructing amphoteric energetic compound with both acidic and basic properties is obtained. The present invention realizes for the first time that a 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring amphoteric energetic compound reacts with an acid to form a corresponding cation salt, which is more advantageous in the application of energetic materials. Starting from known and available raw materials, the expected ring-condensed product is obtained only by controlling the reaction materials with hydrazine hydrate, the reaction temperature and the reaction time. Subsequently, a 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring amphoteric energetic compound with both acidic and basic properties is further obtained, and the anion salt and cation salt of the fused-ring energetic compound are successfully synthesized. This compound has the potential to be a high-energy insensitive energetic material, providing a new idea for the synthesis of novel high-energy energetic compounds in energetic materials.
[0006] The object of the present invention is achieved by the following technical solutions.
[0007] A preparation method of a pyrimidine-ring-breaking and ring-reconstructing fused-ring amphoteric energetic compound cation salt, comprising the following steps:
[0008] Step 1: At -10 to 0 °C, dissolve a pyrimidine-based energetic compound in a hydrazine hydrate solution, then raise the temperature to 120 °C and react for 4 to 5 h. After the reaction is completed, cool and collect the solid to obtain intermediate product I;
[0009]
[0010] Disperse the intermediate product I in an aqueous hydrochloric acid solution, then add cyanogen bromide, and react at room temperature for 12 to 24 h, then filter and collect the solid to obtain an intermediate fused-ring energetic compound II with both acidic and basic properties;
[0011]
[0012] Step 2: Disperse the intermediate product II in a methanol solution, dropwise add a hydrochloric acid solution at 0 to 5 °C, and after the reaction is completed, collect the solid to obtain a 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound cation salt hydrochloride.
[0013]
[0014] Preferably, in step (1), the mass fraction of hydrazine hydrate is 85%.
[0015] Preferably, in step (1), the mass ratio of the pyrimidine-based energetic compound to hydrazine hydrate is 5 to 10 mmol: 8 to 10 mL.
[0016] Preferably, in step (1), the pyrimidine energetic compound is 4,6-dichloro-5-nitropyrimidine.
[0017] Preferably, in step (1), the concentration of the hydrochloric acid aqueous solution is 1 M.
[0018] Preferably, in step (1), the mass ratio of intermediate I to the hydrochloric acid aqueous solution is 1-3 mmol: 10-15 mL.
[0019] Preferably, in step (1), the mass ratio of intermediate I to cyanogen bromide is 6-10 mmol: 52-55 mmol.
[0020] Preferably, in step (2), the mass ratio of intermediate II to the hydrochloric acid solution is 1-2 mmol: 1-3 mmol.
[0021] Beneficial effects:
[0022] 1. In the present invention, through the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound, there are basic N atoms in the structure, which can react with different acids to form corresponding cation salts and water. The density of the high-density amphoteric energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound cation salt is relatively high, having better detonation performance, and is also competitive as a high-energy density material, and is also an ideal insensitive high-energy molecule with good application prospects.
[0023] 2. The present invention provides a 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound. During the preparation process of the compound, only by controlling the reaction materials with hydrazine hydrate, reaction temperature, and reaction time, the corresponding ring-condensed product is obtained, and then the target fused-ring compound is further obtained, so that the reaction can proceed safely and reliably.
[0024] 3. Through the preparation of the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound and its anion salt and cation salt in the present invention, it is experimentally demonstrated that the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound is an amphoteric energetic compound, which can react with both acids and bases to form salts and water. Amphoteric compounds can be applied to probe molecules and also have catalytic effects, making the compound more advantageous in the application of energetic materials.
[0025] 4. Preparation method of the cation salt of the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound of the present invention. Starting from known raw materials, the target product was successfully synthesized through two-step reactions. The synthesized ionic salt of the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound has the potential to be used as a high-energy insensitive material.
[0026] 5. The preparation of the cation salt of the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound of the present invention has a series of advantages such as simple preparation, high yield, high density, high thermal stability, insensitivity, excellent detonation performance, etc., approaching an ideal insensitive high-energy molecule.
[0027] 6. Using the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound as a precursor, high-energy salts with excellent energy performance can be obtained by reacting with bases. The present invention first attempted to react this compound with acids to obtain different cation salts, experimentally proving that this compound is an amphoteric energetic compound that can react with both acids and bases to form corresponding salts and water. Amphoteric compounds can be applied to probe molecules and also have catalytic effects. At the same time, salts of high-density amphoteric energetic compounds have relatively high densities and better detonation performance, and are also competitive as high-energy density materials and are ideal insensitive high-energy molecules with good application prospects. Description of the Drawings
[0028] Figure 1 is the infrared spectrum of the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound. The peak positions in the infrared spectrum are at 552, 744, 1079, 1143, 1197, 1345, 1439, 1500, 1646, 1689, 2652, 3106, 3294;
[0029] Figure 2 is the infrared spectrum of the hydrochloride salt of the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound. The peak positions in the infrared spectrum are at 711, 754, 1077, 1146, 1201, 1338, 1468, 1500, 1571, 1643, 1685, 2689, 3134, 3329;
[0030] Figure 3 is the crystal structure diagram of the hydrochloride salt of the 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound;
[0031] Figure 4It is the infrared spectrum of the nitrate of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole. The peak positions in the infrared spectrum are at 558, 752, 1028, 1079, 1147, 1201, 1339, 1438, 1500, 1643, 1686, 2688, 3133, 3319;
[0032] Figure 5 It is the crystal structure diagram of the nitrate of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole;
[0033] Figure 6 It is the infrared spectrum of the hydroxylamine salt of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole. The peak positions in the infrared spectrum are at 655, 742, 781, 990, 1027, 1239, 1331, 1375, 1603, 1687, 1374, 1603, 1687, 3174, 3360;
[0034] Figure 7 It is the infrared spectrum of the hydrazine salt of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole. The peak positions in the infrared spectrum are at 742, 959, 1027, 1239, 1331, 1371, 1601, 1684, 3174, 3368. Detailed implementation manners
[0035] The present invention will be further described in detail below in conjunction with specific embodiments.
[0036] Example 1
[0037] The preparation method of the pyrimidine ring-breaking and reconstructing fused-ring amphoteric energetic compound cation salt includes the following steps:
[0038] (1) Under ice bath conditions, 1 g (5.0 mmol) of 4,6-dichloro-5-nitropyrimidine was slowly added to 8 ml of an 85% by mass hydrazine hydrate solution. After reacting for 5 min, the temperature was raised to 120 °C and reacted for 4 h. After cooling to room temperature, the intermediate product I was obtained by filtration, and the yield was 30%.
[0039] (2) Under room temperature conditions, 1 g (6.0 mmol) of the intermediate product I was added to 60 ml of a 1 M hydrochloric acid aqueous solution. After reacting for 20 min, 5.5 g (52 mmol) of cyanogen bromide was added. After reacting for 12 h, the fused-ring energetic compound II of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole was obtained by filtration, and the yield was 61%. As Figure 1The infrared spectrum of the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole is shown. The peak positions in the infrared spectrum are at 552, 744, 1079, 1143, 1197, 1345, 1439, 1500, 1646, 1689, 2652, 3106, 3294.
[0040] (3) Disperse 1 g (5 mmol) of the fused-ring energetic compound Ⅱ of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole in 5 ml of methanol solution, and dropwise add 37% hydrochloric acid solution (5 mmol) at 0 - 5 °C. React for 30 min. After the reaction is completed, collect the solid to obtain the hydrochloride salt of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole, with a yield of 61%. As Figure 2 The infrared spectrum of the hydrochloride salt of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole is shown. The peak positions in the infrared spectrum are at 711, 754, 1077, 1146, 1201, 1338, 1468, 1500, 1571, 1643, 1685, 2689, 3134, 3329. Figure 3 The crystal structure diagram of the hydrochloride salt of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole.
[0041] The hydrochloride salt of the fused-ring energetic compound of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole has low mechanical sensitivity, and its impact sensitivity (IS > 10 J) and friction sensitivity (FS > 360 N) both meet the standards of insensitive energetic materials. The comprehensive energy performance, thermal stability, and mechanical sensitivity and other indicators are all good. It has the advantages of easily available raw materials, mild reaction conditions, and high yield, showing good industrial application prospects. It provides new ideas and methods for the design and synthesis of new high-energy and low-sensitivity energetic materials, and has important theoretical significance and application value for promoting the development of the field of energetic materials.
[0042] Example 2
[0043] A preparation method of a pyrimidine ring-breaking and reconstructing fused-ring amphoteric energetic compound cation salt, comprising the following steps:
[0044] (1) Under ice bath conditions, slowly add 1 g (5.0 mmol) of 4,6-dichloro-5-nitropyrimidine to 8 ml of 85% hydrazine hydrate solution. After reacting for 5 min, raise the temperature to 120 °C and react for 4 h. After cooling to room temperature, filter to obtain intermediate product Ⅰ, with a yield of 30%.
[0045] (2) At room temperature, 1 g (6.0 mmol) of intermediate I was added to 60 ml of 1 M hydrochloric acid aqueous solution. After reacting for 20 min, 5.5 g (52 mmol) of cyanogen bromide was added. After reacting for 12 h, 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound II was obtained by filtration, with a yield of 61%.
[0046] (3) 1 g (5 mmol) of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound II was dispersed in 5 ml of methanol solution. At 0 - 5 °C, a 68% nitric acid solution (5 mmol) was added dropwise. After reacting for 30 min, the solid was collected to obtain 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound nitrate, with a yield of 30%. As Figure 4 shown is the infrared spectrum of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound nitrate. The peak positions in the infrared spectrum are at 558, 752, 1028, 1079, 1147, 1201, 1339, 1438, 1500, 1643, 1686, 2688, 3133, 3319. Figure 5 is the crystal structure diagram of 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound nitrate.
[0047] Example 3
[0048] A preparation method of a pyrimidine ring-opening and ring-reconstructing fused-ring amphoteric energetic compound anion salt, comprising the following steps:
[0049] (1) Under ice bath conditions, 1 g (5.0 mmol) of 4,6-dichloro-5-nitropyrimidine was slowly added to 8 ml of 85% hydrazine hydrate solution. After reacting for 5 min, the temperature was raised to 120 °C and reacted for 4 h. After cooling to room temperature, the intermediate I was obtained by filtration, with a yield of 30%.
[0050] (2) At room temperature, 1 g (6.0 mmol) of intermediate I was added to 60 ml of 1 M hydrochloric acid aqueous solution. After reacting for 20 min, 5.5 g (52 mmol) of cyanogen bromide was added. After reacting for 12 h, 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole fused-ring energetic compound II was obtained by filtration, with a yield of 61%.
[0051] (3) Disperse 1 g (5 mmol) of the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole II in 5 ml of methanol solution, and dropwise add a 50% by mass hydroxylamine solution (5 mmol) at 0 - 5 °C. React for 30 min. After the reaction is completed, collect the solid to obtain the hydroxylamine salt of the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole, with a yield of 88%. As Figure 6 shown is the infrared spectrum of the hydroxylamine salt of the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole. The peak positions in the infrared spectrum are at 655, 742, 781, 990, 1027, 1239, 1331, 1375, 1603, 1687, 1374, 1603, 1687, 3174, 3360.
[0052] Example 4
[0053] Preparation method of the pyrimidine ring-cleavage and reconstruction fused-ring amphoteric energetic compound anion salt, comprising the following steps:
[0054] (1) Under ice bath conditions, slowly add 1 g (5.0 mmol) of 4,6-dichloro-5-nitropyrimidine to 8 ml of an 85% by mass hydrazine hydrate solution. After reacting for 5 min, raise the temperature to 120 °C and react for 4 h. After cooling to room temperature, filter to obtain the intermediate product I, with a yield of 30%.
[0055] (2) Under room temperature conditions, add 1 g (6.0 mmol) of the intermediate product I to 60 ml of a 1 M hydrochloric acid aqueous solution. After reacting for 20 min, add 5.5 g (52 mmol) of cyanogen bromide and react for 12 h. Then filter to obtain the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole II, with a yield of 61%.
[0056] (3) Disperse 1 g (5 mmol) of the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole II in 5 ml of methanol solution, and dropwise add an 85% by mass hydrazine hydrate solution (5 mmol) at 0 - 5 °C. React for 30 min. After the reaction is completed, collect the solid to obtain the hydrazine salt of the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole, with a yield of 93%. As Figure 7 shown is the infrared spectrum of the hydrazine salt of the fused-ring energetic compound 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole. The peak positions in the infrared spectrum are at 742, 959, 1027, 1239, 1331, 1371, 1601, 1684, 3174, 3368.
[0057] The specific description above further elaborates on the purpose, technical solution, and beneficial effects of the invention. It should be understood that the above description is only a specific embodiment of the present invention and is not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.
Claims
1. A method for preparing a cation salt of a pyrimidine ring-breaking and reconstructing condensed ring amphoteric energetic compound, characterized in that: The steps include: Step 1: dissolving 4,6-dichloro-5-nitropyrimidine in a hydrazine hydrate solution at -10 to 0°C, then heating to 120°C, reacting at this temperature for 4 to 5 hours, cooling and collecting the solid to obtain an intermediate product I; The intermediate product I is dispersed in a hydrochloric acid aqueous solution, and then cyanogen bromide is added. After reacting at room temperature overnight, the solid is collected by filtration to obtain an intermediate product condensed ring energetic compound II having both acidity and alkalinity; Step 2: Disperse the condensed ring energetic compound II in a methanol solution, add an acidic solution dropwise at 0-5°C, and after the reaction is completed, collect the solid to obtain a 3-amino-6-hydrazino-7-nitropyrazolo[1,2,4]triazole condensed ring energetic compound cationic salt.
2. The method according to claim 1, characterized in that: In step 1, the mass fraction of hydrazine hydrate is 85%; the mass ratio of the 4,6-dichloro-5-nitropyrimidine to hydrazine hydrate is 5-10 mmol: 8-10 mL; the concentration of the aqueous hydrochloric acid solution is 1 M; the mass ratio of the intermediate product I to the aqueous hydrochloric acid solution is: 1-3 mmol: 10-15 mL; the mass ratio of the intermediate product I to cyanogen bromide is 6-10 mmol: 52-55 mmol; the mass ratio of the condensed ring energetic compound II to the acidic solution is: 1-2 mmol: 1-3 mmol.
3. The method according to claim 1, characterized in that: The acidic solution in step 2 includes: nitric acid solution, hydrochloric acid solution, and perchloric acid solution.
4. The method according to claim 1, characterized in that: In step 1, the mass fraction of hydrazine hydrate is 85%.