7-Chloroimidazo[1,2-a]pyridine

In "Tiangong Kaiwu", 7-nitrate explosive [1,2-a] is mainly used for firearm firing and exploding to break the enemy.
This explosive is used in the military field and plays a significant role in warfare. First, when a firearm is fired, 7-nitrate explosive provides a strong thrust for the projectile. For firearms such as firearms, it is loaded into the barrel of the gun. After ignition, the explosive burns violently, generating a large amount of high-temperature and high-pressure gas in a short time. These gases expand rapidly, forming a strong thrust, pushing the projectile to shoot out of the barrel at high speed, attacking enemies at a distance, greatly enhancing the firearm's killing range and power.
Second, in terms of exploding and breaking the enemy, 7-nitrate explosives are made into various types of bombs, which are thrown into the enemy's camp when they attack the city. The explosive explodes instantly, releasing huge energy, generating strong shock waves and splashing shrapnel. Shock waves can knock down enemy soldiers, destroy enemy defenses, and shrapnel can kill surrounding enemy troops, effectively causing damage to enemy personnel and facilities, creating favorable conditions for their own military operations.
In military confrontation scenarios, 7-nitrate explosives [1,2-a] have become a key factor in defeating the enemy on the battlefield due to their unique explosive properties. Whether it is long-range attack or close-range destruction, they all play an irreplaceable role, greatly affecting the direction and outcome of the war.

The synthesis method of 7-alkoxybenzo [1,2-a] pyridine is covered by the following numbers:
First, it is formed by coupling the Ullmann type reaction with o-halogenated pyridine and phenolic compounds as starting materials in the presence of a base and a metal catalyst. This reaction requires the coordination of suitable ligands to make the reaction efficient. If a copper salt is used as the catalyst, the ligand is selected 1,10-phenanthroline, etc. At a suitable temperature and reaction time, the halogen atom of the halogenated pyridine reacts with the hydroxyl group of the phenol to construct the skeleton of 7-alkoxybenzo [1,2-a] pyridine.
Second, by selective alkoxylation of the parent body of benzopyridine. Benzopyridine compounds can be prepared first, and then phenolic compounds can be used to carry out electrophilic substitution reactions under specific conditions. Using sulfuric acid or Lewis acid as catalysts, the oxygen atoms of phenol attack the appropriate positions on the benzopyridine ring, and alkoxy groups are introduced to achieve the synthesis of 7-alkoxy benzo [1,2-a] pyridine. However, this method needs to pay attention to the control of reaction conditions to avoid side reactions such as polysubstitution.
Third, alkenyl compounds containing pyridine structures and phenolic derivatives are synthesized by cyclization reaction as raw materials. Under the catalysis of transition metals, alkenyl groups and phenolic hydroxyl groups undergo intramolecular cyclization reactions. For example, in a basic environment with palladium catalyst, the double bonds on the alkenyl groups are cyclized with phenolic hydroxyl groups to form the target product. The key to this approach lies in the design of the substrate and the optimization of the reaction conditions to ensure the smooth occurrence of the cyclization reaction, and the regioselective generation of 7-alkoxy benzo [1,2-a] pyridine.
Fourth, the heterocyclization reaction strategy is used. Under specific reagents and conditions, the heterocyclization reaction occurs in molecules with pyridine derivatives and phenolic compounds with suitable substituents as starting materials. For example, some dehydrating agent or condensing agent is used to induce cyclization and condensation between the pyridine derivative and the phenol to form the 7-alkoxy benzo [1,2-a] pyridine structure. This method requires careful design of the structure of the reactants to guide the reaction in the direction of the target product.

There are many oxygen rockets today, what is the future of their market? Let me analyze it.
For those who use oxygen rockets, we will push them forward with oxygen. The two are anti-energy, and the rocket will be empty. First, there are many reasons for this. First, the clean dyeing, the burning materials are only water, and the environment is friendly, which is in line with the expectations of the world. Second, the energy emission is very high, and the ratio is large, which can give the rocket more thrust, and help it lift off and go to the sky.
And the market prospect, the space exploration field, the demand. All countries in space, not scientific research, satellite launch, or human spaceflight journey, all need the help of rockets. The excellent performance of oxygen rockets is the best. Since commercial aerospace, multi-commercial companies have been involved in satellite deployment, etc., and the demand for high-performance and guaranteed rockets is also increasing. Oxygen rockets can provide them with efficient solutions, and gain a place in the commercial space market.
Furthermore, space travel is a big deal. With the increasing maturity of technology, it is expected to revolutionize space travel. The clearing power of oxygen rockets can ensure the safety and comfort of space travel, attract more customers to join the space journey, and expand the market.
However, it is also challenging. The degree of oxygen storage is large, and it requires high cost of exquisite technology. And the construction of the phase is not perfect, which makes it possible for its rapid development. However, in the next few days, with technological innovation and cost control, the oxygen rocket will surely be able to make a big impact, which will be an important position in the space market and lead the space industry to a new direction.

Mercury, commonly known as mercury, is the only metal that is liquid at room temperature. Mercury has unique physical and chemical properties, and is a wonder created by heaven and earth.
Mercury is silver-white in color and dazzling luster, just like the moon. Its quality is soft and flowing, and it is smooth to the touch, just like smart water, but it also has the texture of metal, which can be gathered or scattered, and its shape is changeable. At room temperature, mercury exists in a liquid state, which is very different from the solid state of common metals. This is its remarkable physical property.
Mercury has a high density, which is heavier than ordinary liquids. It is placed in a container, calm and quiet, as if it contains endless mysteries. And the boiling point of mercury is relatively low, and it is easy to evaporate into mercury vapor when heated. This vapor is colorless, odorless, but toxic. It can quietly invade the human body and endanger health. This is one of the major characteristics of mercury.
As for the chemical properties, mercury is moderately active. Although it does not react violently with metals such as potassium and sodium in contact with water, it can also undergo wonderful chemical changes with many substances. Mercury can quickly combine with sulfur powder to form mercury sulfide. This reaction is like a fusion of yin and yang, instantly changing the properties of the substance. Mercury can also form amalgam with some metals, just like forming a special alliance, giving materials different properties.
Mercury's physical and chemical properties make it unique in many fields, but it also requires extreme caution when using it due to its toxicity.

Shinjai, guest asked about the application of mercury pills in the field of medicine. This is an important matter related to the health of people's livelihood. Let me state it in detail.
Mercury pills have been used in medicine for a long time. Ancient healers often used mercury pills to treat sores. When sores start up, they are red, swollen and hot, and mercury pills are applied, which has the ability to extract poison and reduce swelling. Its dryness can promote the leakage of poison and evil in sores, so that the poison gas has a way out, thereby dissipating the swelling.
And in the case of scabies, mercury pills are also effective. Scabies is a disease of the skin, mostly caused by the invasion of damp evil insects. Mercury pill can kill scabies, remove the dampness of the skin, relieve the symptoms of scabies, itching, erosion, etc., and make the skin gradually return to normal.
However, although mercury pill has medicinal properties, it should not be used with caution. It contains mercury and mercury, which are toxic. If used in excess or improperly, it may cause poisoning. Light dizziness, fatigue, nausea, and serious life-threatening. Therefore, ancient physicians must carefully review the condition when using mercury pill, accurately determine the dose, and ensure the safety of medication.
Furthermore, when bleeding from trauma, mercury pill also has the power of converting and stopping bleeding. When the surface of the body is damaged and bleeding, appropriate application of mercury pills can make the blood coagulate, stop the bleeding, and create conditions for wound healing.
In short, mercury pills are used in the field of medicine, in sores, scabies, trauma bleeding, etc. However, its toxicity cannot be underestimated, and it needs to be used with caution in order to exert its benefits and avoid its harm.