(1 - (hydroxymethyl) -2 - ethyl - 4 - pyridylfuran, this substance is called 5 - hydroxymethylfurfural, its main uses are as follows:)
5 - hydroxymethylfurfural is an extremely critical organic synthesis intermediate, which is widely used in many fields.
First, in the chemical industry, it can be used as an important raw material for the synthesis of polyester, polyurethane and other polymer materials. Through specific chemical reactions, 5 - hydroxymethylfurfural can be polymerized with polyols, polyacids and other substances to obtain polymers with different properties. These polymer materials are widely used in plastics, fibers, coatings and many other fields, which greatly promotes the development of the chemical industry.
Second, in the field of energy, 5-hydroxymethylfurfural has the potential to be converted into biofuels. Through a series of catalytic hydrogenation, dehydration and other reaction steps, 5-hydroxymethylfurfural can be converted into high-energy-density biofuels such as 2,5-dimethylfuran. Compared with traditional fossil fuels, such biofuels have outstanding advantages such as renewable and low pollution, and are expected to become an important part of future energy, which is of great significance for alleviating energy crisis and environmental pressure.
Third, in the field of medicine, 5-hydroxymethylfurfural and its derivatives show certain biological activity. Some derivatives have been confirmed to have antibacterial, anti-inflammatory, anti-tumor and other pharmacological effects, providing a new direction and opportunity for the research and development of new drugs. Pharmaceutical researchers can modify and modify the structure of 5-hydroxymethylfurfural based on the structure, in order to develop more efficient and low-toxicity new drugs for the benefit of human health.
Fourth, in the food field, 5-hydroxymethylfurfural is often used as a precursor to food flavor substances. During food processing, especially during high temperature treatment, sugar and amino acids undergo Maillard reaction to generate 5-hydroxymethylfurfural. The amount of its content is often closely related to the color and flavor of the food. However, excessive amounts of 5-hydroxymethylfurfural may also pose a potential hazard to human health, so the food industry is also very concerned about its content control in food.

(Hydroxymethyl) -2-pentene-4-ketofuran, this material property is unique. Its shape is usually liquid, color or nearly nothing, transparent and fluid, and it looks like water, but its properties are different.
In terms of its taste, it has a specific fragrance, and the smell has a strong smell. Although it is not pungent, it is also distinct and can often attract attention.
Its boiling degree is quite high. To make it boil, it needs to reach a certain temperature, which is caused by intermolecular forces. The melting degree is relatively low, and it takes the shape of a liquid at room temperature.
Solubility is also an important physical property. In water, its solubility is limited, and the two are mixed, slightly soluble but difficult to fully melt, and the appearance of stratification may appear. However, in organic solvents of alcohols and ethers, its solubility is good, and it can be mutually soluble with them and mix into a uniform phase.
Furthermore, it has a certain volatility. In an open vessel, the amount decreases over time, and the molecules escape from the liquid surface and disperse in the air. This property makes it necessary to keep it properly in some applications to prevent dissipation.
And its density is slightly different from that of water. It can float or sink in water, depending on its exact density value.
These physical properties are of great significance in the chemical, pharmaceutical, and fragrance industries. Due to its unique fragrance, it can be used for flavoring and enhancing the flavor of the product; in medicine, or because of its structural characteristics, it has specific pharmacological activities; in chemical industry, its solubility and volatility can be used as a reaction medium or a raw material involved in the reaction, assisting in the synthesis of various industries.

To prepare 1 - (hydroxymethyl) - 2 - aldehyde - 4 - carboxybenzene, there are three methods.
First, benzene is used as the beginning, and after alkylation, toluene is obtained. Toluene interacts with chlorine under light to produce benzyl chloride, and then co-heats with formaldehyde and zinc chloride to introduce hydroxymethyl to obtain p-hydroxymethyltoluene. Then a mild oxidizing agent, such as manganese dioxide-sulfuric acid system, oxidizes the methyl group as the aldehyde group to obtain p-hydroxymethylbenzaldehyde. Finally, under appropriate conditions, a strong oxidizing agent, such as potassium permanganate, and an aldehyde group as the carboxyl group, then the target is obtained.
Second, with p-methylbenzoic acid as the beginning, first with phosphorus trichloride and chlorine gas to make methyl chlorination, to obtain p-chloromethylbenzoic acid. Then it is co-heated with formaldehyde and alkali to introduce hydroxymethyl to generate 1- (hydroxymethyl) -4-carboxybenzene. Then a mild oxidation method, such as Dess-Martin reagent, oxidizes the hydroxymethyl to form an aldehyde group, to obtain.
Third, starting with p-cresol, first with formaldehyde and acid catalysis, the hydroxymethyl group is introduced into the phenolic hydroxyl group to obtain 4-methyl-2-hydroxybenzyl alcohol. Protect the phenolic hydroxyl group with an appropriate protective group, such as tert-butyl dimethylsilyl. After a mild oxidizing agent, such as PCC, hydroxymethyl oxide as an aldehyde group. Then deprotecting the group, a strong oxidizing agent, such as potassium dichromate, methyl oxide as a carboxyl group, can also be obtained.
All methods have advantages and disadvantages. The first method has many steps, but the raw materials are common and easy to obtain; the second method is more concise, but the reagents used may be dangerous; the three methods have high requirements for phenol hydroxyl protection, but can precisely control the reaction check point. Practical management, when selected according to the situation.

Ether groups, hydroxyl groups, carboxyl groups, carbonyl groups and other groups do have many things to pay attention to when storing and transporting.
Let's talk about ether groups first, their properties are relatively stable, but they should not be taken lightly. Ether compounds are volatile and easy to form peroxides. Therefore, when storing, it should be placed in a cool and ventilated place, away from fire and heat sources, to prevent the risk of explosion caused by the accumulation of volatile gases. Regularly check the sealing of the container to prevent gas from escaping. Peroxides formed by ethers are explosive when heated or impacted. The storage period should not be too long, and inhibitors should be added to prevent the formation of peroxides. During transportation, ensure that the packaging is sturdy to avoid damage to the container caused by collision.
Hydroxy compounds, many of which are hydrophilic and easy to absorb moisture. Storage should be in a dry environment and sealed to prevent deterioration caused by absorption of moisture in the air. Some hydroxyl-containing substances are corrosive, such as alkali metal salts of certain alcohols, which can cause burns when exposed to skin or mucous membranes. When storing such substances, the container material should be resistant to corrosion and should be well marked. When transporting, follow the transportation rules of corrosive substances and take protective measures.
Carboxyl compounds, many of which are acidic. Storage requires corrosion-resistant containers, such as glass or specific plastic materials, to prevent reactions with metal containers. Because of its acidity, contact with alkaline substances can react violently, so when storing, it should be placed separately from alkaline substances. During transportation, take good measures to prevent leakage. If leakage occurs, neutralize it with alkaline substances in time.
Carbonyl compounds, some of which have irritating odor and toxicity. Storage should ensure good ventilation to reduce the accumulation of harmful gases. Some carbonyl compounds are chemically active and easily react with other substances. When storing, pay attention to avoid mixing with easily reactive substances. When transporting, strictly follow the transportation requirements of toxic and hazardous substances to ensure that the packaging is tight to prevent leakage from causing harm to the environment and human body.
In short, for substances containing such groups, whether stored or transported, they must follow the corresponding specifications and requirements according to their characteristics, and take safety protection measures to ensure the safety of personnel and the environment from pollution.

Today's question, what is the approximate market price of (hydroxymethyl) -2-ene-4-carbonyl pyridine? This is a key raw material in the field of fine chemicals, widely used in medicine, pesticides, materials and other industries, and its price is often affected by raw material costs, production processes, market supply and demand and many other factors.
In the past, if raw materials were abundant and mature, and the market supply was abundant, the price might be relatively stable. However, once raw materials are scarce, such as a key starting material due to the shortage of origin or policy regulation, the manufacturer must increase the price of the product in order to ensure profits. Or the production process encounters a bottleneck, such as the lagging research and development of a new type of catalyst, resulting in low production efficiency and rising costs, which will also drive up prices.
Looking at the current market, if the demand is strong, such as the pharmaceutical industry developing special new drugs with this as a key intermediate, orders will come in one after another, and the supply will exceed the demand, and the price will rise. On the contrary, if the development of downstream industries is blocked and the demand is weak, the price will be under downward pressure.
According to industry rumors and recent market monitoring, its price fluctuates between [X] yuan and [X] yuan per kilogram. However, this is only a rough range. The actual price depends on the quality, purity, number of transactions and bargaining power of buyers and sellers at the time of specific transactions. Purchasers should look for more suppliers to compare prices and quality in order to obtain a suitable price.