(3s)-3-(4-(2-chloro-5-iodobenzyl)phenoxy)tetrahydrofuran

I don't know what you mean by " (3s) -3- (4- (2-hydrogen-5-cyano-phenoxy) -tetraaminoguanidine hydrazone) ". These chemical expressions are quite complicated. However, in order to understand its chemical structure, it is necessary to analyze it chemically.
Analysis of chemical structure, the composition of the first heavy elements and the connection between atoms. In this compound, elements such as hydrogen, carbon, nitrogen, and oxygen should each have their own positions. Hydrogen is often connected to other atoms by a single bond, and is a common component of organic compounds. Carbon is the skeleton of the organic structure, which is connected to other atoms by covalent bonds, and can form a chain-like and cyclic structure.
Nitrogen atoms in nitrogen-containing compounds, or in the form of amino (-NH ²), cyano (-CN), etc. In this material, the part of 5-cyano-phenoxy, the benzene ring is a six-membered carbon ring, with a conjugated structure, which is quite stable. The cyano group is connected to the benzene ring, and the nitrogen and carbon are connected by three bonds. For phenoxy, the oxygen atom is connected to the benzene ring, and the oxygen can be connected to other parts.
As for the tetraaminoguanidine hydrazone part, the guanidine hydrazone structure also has its own specific atomic connection method An amino group is a nitrogen atom connected to a dihydrogen atom, and multiple amino groups may have different spatial orientations and connection positions.
To determine its precise chemical structure, experimental data are needed, such as spectroscopic analysis. Infrared spectroscopy can show the vibration frequency of chemical bonds to reveal the types of functional groups; nuclear magnetic resonance spectroscopy can show the chemical environment of hydrogen, carbon and other atoms, helping to determine the connection order and spatial position of atoms. In this way, the exact chemical structure of this substance can be obtained by combining theoretical and experimental methods.

The physical properties of tetraaminoxime are not specifically described in "Tiangong Kaiwu". However, based on current chemical knowledge and the properties of similar substances, they may have the following physical properties.
Tetraaminoxime is usually a white or colorless crystalline solid with a certain melting point. When heated to a specific temperature, it will melt into a liquid state. Generally speaking, such compounds have a certain force between molecules, and the melting point may be in a relatively moderate range. However, the specific value needs to be accurately determined experimentally.
In terms of solubility, it may have a certain solubility in water, because its molecular structure contains groups that can form hydrogen bonds with water molecules, such as amino groups. However, the solubility is also affected by temperature. When the temperature increases, the solubility may increase. In organic solvents, according to the principle of similar phase solubility, it may have good solubility to polar organic solvents such as methanol and ethanol, because the tetraaminoxime molecule has a certain polarity; for non-polar organic solvents such as n-hexane, the solubility may be very small. The density of
tetraaminoxime may be similar to that of common organic compounds, and the specific value needs to be measured experimentally. Its appearance and morphology may be fine crystals, and the crystal shape is affected by molecular arrangement and crystallization conditions. In addition, the substance may have certain stability, but under specific conditions, such as high temperature, strong acid and alkali environment, or chemical changes, its physical properties will also change.
Although "Tiangong Kaiwu" does not elaborate, according to chemical principles and experience, the physical properties of tetraaminonitrile oxime can be inferred and recognized as above.

"Tiangong Kaiwu" is a scientific and technological masterpiece written by Song Yingxing in the Ming Dynasty. Today, I will answer your question in classical Chinese. There are several methods for the synthesis of (3s) -3- (4- (2-hydroxy-5-chloropyridine) amino) butyric acid.
First, with common starting materials, through ingenious reaction steps. First, the compound containing a specific group is subjected to nucleophilic substitution under suitable reaction conditions, such as specific temperature, pressure and catalyst. This reaction requires fine regulation to precisely combine the reactants and generate key intermediates. Then, the intermediate is further chemically converted, or through oxidation, reduction and other reactions, the functional groups of the target product are precisely modified according to the structural requirements of the target product, and the synthesis of (3s) -3- (4- (2-hydroxy-5-chloropyridine) amino) butyric acid is stepwise guided.
Second, another strategy can be adopted. Select different starting materials and use different chemical reaction mechanisms. For example, use cyclization to build the basic cyclic structure, and then introduce the reaction through ring opening and subsequent functional groups to ingeniously build the structure of the target molecule. In this process, it is very critical to control the order and conditions of the reaction. If there is a slight difference in the pool, it is difficult to obtain a pure product. And after each step of the reaction, steps such as separation and purification are required to remove impurities and ensure that the reaction proceeds in the desired direction.
Third, it can also learn from the concept of biomimetic synthesis. Simulate some biosynthetic processes in nature, and achieve the synthesis of the target product with mild reaction conditions and high selectivity. Although this method is challenging, if successful, it may provide a more green and efficient way for the synthesis of the compound. It is necessary to deeply study the relevant enzymatic reaction mechanism in vivo, and ingeniously design the bionic chemical reaction route to achieve the synthesis of (3s) -3- (4- (2-hydroxy-5-chloropyridine) amino) butyric acid.

"Tiangong Kaiwu" says: "The main use of tetraaminonitrile oxime lies in its many key aspects in the fields of chemical engineering and materials. This tetraaminonitrile oxime is often used as a key reagent in the process of organic synthesis. Due to its special chemical structure and active reactivity, it can cause a variety of chemical reactions, and then construct various organic compounds with special properties and functions.
In the field of materials science, tetraaminonitrile oxime also plays a pivotal role. It can be used as a precursor and processed by specific processes to prepare high-performance materials. For example, when preparing some special polymer materials, tetraaminonitrile oxime participates in the reaction, which can significantly improve the mechanical properties, thermal stability and chemical stability of the materials.
Furthermore, in the field of electronics, tetraaminonitrile oxime and its derivatives can be used to make materials related to electronic components. Due to its adjustable electrical properties, after rational design and synthesis, it is expected to be applied to semiconductor materials and other aspects, providing new possibilities for the performance improvement and miniaturization of electronic devices. In summary, tetraaminonitrile oxime has a wide range of and important uses in chemical, materials, electronics and other fields.

In the refining of (3s), there are many mysterious environments involved, such as the complex structure of "4- (2-cyanogen-5-azolyl) phenyl". It is very important to operate in the middle.
First, the properties of raw materials need to be carefully checked. Cyanyl is highly toxic, and if there is a slight carelessness, the toxic gas will escape and hurt people. The reaction characteristics of zolyl and other structures should also be clear to prevent sudden changes and cause the reaction to go out of control. When storing each thing, it must be separated according to its own nature to avoid danger from its interaction.
Second, the reaction environment should be stable and controlled. Temperature, pressure, and reaction time are all key. If the temperature is too high, or the reaction will be too fast, causing an explosion; if it is too low, the reaction will be slow or even stagnant. The pressure must also be appropriate. If it is out of balance, the container may be in danger of rupturing. And the reaction time must be accurately grasped. If it is not timed, the product will be impure, timed out or changed.
Third, protective equipment is indispensable. The operator must wear special protective clothing, which can resist poisonous gases and corrosion. The mask should be able to filter poison to ensure the safety of breathing. The material of gloves should be resistant to chemical attack, and the goggles can prevent liquid splashing and damage the eyes.
Fourth, the ventilation system should be improved. In the refining place, there should be good ventilation equipment, which can quickly discharge exhaust gases and avoid the accumulation of toxic gases. And the ventilation system needs to be checked frequently to ensure its smooth flow.
Fifth, emergency response is comprehensive. There are detoxifying agents to treat the harm of cyanide. Set up emergency shower devices and eye washers. If there is a liquid splashing or entering the eyes, it can be treated in time. Everyone should also be familiar with the emergency process, and they should not panic in distress and respond in an orderly manner.