2,4-dimethyl-1H-imidazole

Although 2% 2C4-diamino-1H-pyrazole did not have this exact chemical expression in the era covered by Tiangong Kaiqi, from a modern perspective, such compounds have important uses in many fields.
In the field of medicine, diaminopyrazole compounds can be used as key intermediates for the synthesis of drugs. Due to their structural properties, they can participate in the construction of drug molecules and can be used to develop drugs with specific pharmacological activities. For example, in the synthesis of some antibacterial and anti-inflammatory drugs, it may be used as an important starting material. Through a series of chemical transformations, drug molecular structures with precise therapeutic effects can be constructed, thus playing a therapeutic role in related diseases.
In materials science, diaminopyrazole can be used to prepare functional materials. For example, when synthesizing high-performance polymer materials, it can participate in the polymerization reaction as a special monomer, giving the material unique properties, such as improving the heat resistance, mechanical strength or optical properties of the material. For example, in the preparation of some polymer materials for electronic devices, the introduction of diaminopyrazole structural units can make the material more suitable for the stability and conductivity requirements of electronic devices.
In the dye industry, its structure can be used as a component of chromophore or chromophore. Through rational chemical modification and synthesis, dye molecules based on diaminopyrazole can exhibit rich and stable colors, and have good dyeing properties. They can be used to dye fabrics, leather, and other materials to meet the needs of different industries for color.

The physical properties of 2% 2C4-dimethyl-1H-pyrazole are as follows:
Viewed at room temperature, it is mostly a colorless to light yellow liquid, just like the clarity of water, or like the shimmer of light gold. The texture is pure and free of impurities, and it reflects a different luster under light.
Smell it, it has a unique smell, just like being in a strange spice shop. It is not a pungent stench or a rich sweet fragrance, but a special fragrance. It feels a little unfamiliar when you smell it at first, but it has a unique charm when you smell it carefully.
As for its melting point and boiling point, the melting point is in a specific low temperature range. Under appropriate cooling conditions, it can be seen that it slowly changes from liquid to solid state, as if time solidifies, and ice crystals gradually form; the boiling point is in a suitable pressure environment. At a certain temperature, the liquid quickly turns into a gaseous state and rises, just like the ethereal clouds.
When it comes to solubility, among many organic solvents, it is like a fish getting water, which is easy to blend, and can be uniformly mixed with alcohols, ethers and other organic solvents, indistinguishable from each other; however, the solubility in water is different. Although it is not completely insoluble, it can only dissolve a little, just like oil droplets in water, slightly dispersed, but difficult to completely blend. < Br >
Above the density, it is slightly lighter than water. If it is slowly poured into the water, it can be seen that it floats on the water surface, like a light boat, leisurely, and the boundaries between the two are clear, forming a scene of its own.
In addition, it also has a certain volatility. In an open environment, it does not take long to notice that it gradually dissipates into the air, as if it is invisible, leaving only traces of its unique smell, indicating that it once existed.

2% 2C4-dimethyl-1H-pyrrole is chemically stable. The stability of this substance is related to the characteristics of its structure and chemical bonds.
From a structural perspective, dimethyl is connected to the pyrrole ring, and the presence of methyl has an impact on the electron cloud distribution of the pyrrole ring. Pyrrole rings are aromatic, which is one of the important foundations for their stability. Aromatic systems usually have special electron delocalization, which decreases the molecular energy and improves the stability.
The electron supply effect of dimethyl can change the electron cloud density distribution on the pyrrole ring to a certain extent. Although the electron cloud density at some positions of the pyrrole ring may be increased by the action of the electron supplier, theoretically increasing the electrophilic reactivity, at the same time, this electron cloud adjustment also contributes to the overall stability of the molecule. Because it makes the electron distribution in the molecule more reasonable and reduces the energy of the system.
Under common conditions, 2% 2C4-dimethyl-1H-pyrrole can remain relatively stable. However, its stability may be challenged under extreme conditions such as strong oxidizing agents, strong acids or high temperatures. Strong oxidizing agents can destroy the aromatic structure of the pyrrole ring, initiate oxidation reactions, and change the molecular framework; strong acids or protonation reactions with the pyrrole ring disrupt the electron cloud distribution, thereby affecting its stability. High temperature may also cause reactions such as thermal cracking of molecules, destroying their original structures.
Overall, 2% 2C4-dimethyl-1H-pyrrole is relatively stable in conventional environments and general chemical operating conditions, but under specific harsh conditions, the stability will be significantly affected.

There are many synthesis methods of 2% 2C4-dimethyl-1H-pyrazole, which are described in detail below.
First, acetylacetone and hydrazine hydrate are used as starting materials. First, acetylacetone and hydrazine hydrate undergo condensation reaction under suitable conditions. This process requires attention to the reaction temperature, time and the proportion of reactants. If the temperature is too high or the time is too long, side reactions may occur; improper ratio also affects the yield. During the reaction, the two molecules are cleverly combined to gradually build the prototype of the pyrazole ring. By precisely regulating the reaction conditions, the generation efficiency of the target product can be improved.
Second, 2,4-pentanedione and hydrazine compounds are used as raw materials. 2,4-Pentanedione has a special structure and reacts with hydrazine compounds in a specific medium to form 2% 2C4-dimethyl-1H-pyrazole through cyclization steps. The choice of solvent in this process is crucial, and different solvents have a significant impact on the reaction rate and selectivity. Some polar solvents may accelerate the reaction process, but may reduce the selectivity of the product; non-polar solvents may improve the selectivity, but the reaction rate may be affected. Therefore, it is necessary to weigh the advantages and disadvantages and choose the best reaction solvent.
Third, 3-methyl-2-butene-1-one and hydrazine compounds are used as the starting materials. First, 3-methyl-2-butene-1-one is pretreated to adjust its reactivity, and then reacts with hydrazine compounds. The reaction mechanism of this route is complex, involving multiple reaction steps and intermediate conversion. Each step needs to be carefully controlled. By optimizing the reaction conditions, such as pH, temperature, catalyst type and dosage, etc., the reaction can be carried out efficiently in the direction of generating the target product.
Fourth, with the help of transition metal catalytic synthesis method. Under the action of transition metal catalysts, select suitable substrates and couple and cyclize to obtain 2% 2C4-dimethyl-1H-pyrazole. Transition metal catalysts have high activity and selectivity, which can effectively promote the reaction and improve the purity and yield of the product. However, they are expensive, and some catalysts are difficult to recover and have high costs. Therefore, it is necessary to comprehensively consider the economic cost and catalytic effect when using, and explore the best use plan.
The above synthesis methods have advantages and disadvantages. In practical applications, the appropriate synthesis path should be carefully selected according to factors such as specific needs, raw material availability, cost considerations and process conditions.

I have heard your inquiry about the price range of dimethyl-1H-pyrazole in the market. However, I have searched ancient books, and this chemical thing is not known to me at the time. In today's world, technology is changing day by day, and the price of various things changes with the supply and demand of the market and the amount of production.
If you want to know the exact price of dimethyl-1H-pyrazole, you need to visit today's chemical market, chemical merchants, or consult professional chemical information platforms. The price may vary depending on the purity of the product, the quantity, the region and time of purchase. Generally speaking, the price of chemical products often fluctuates, and it is difficult to determine its exact range. Although I cannot tell you the price directly, I hope that if you follow this path, you will surely obtain its details.