2 Iodo 4 Nitroaniline

4-Acanthate-based dace rays are also marine products. They have a wide range of uses, and they can be found in detail in "Tiangong Kaiwu".
The first is edible. 4-Acanthate-based dace rays have fresh and tender meat and a very beautiful taste. There are various cooking methods. When fried, the outer skin is crispy, the inner meat is soft and tender, and the aroma is overflowing; when stewed, the soup is rich, the fish meat is tasty, and it is quite nutritious. It can provide many nutrients for eaters, replenish the body and strengthen the body. It is the top grade among seafood and is loved by everyone.
The second is medicinal. Part of its body has medicinal effects. Ancient healers, after long-term exploration and practice, found that some parts of the 4-spiny dace rays can be used as medicine, or can promote blood circulation and remove blood stasis, which has a relieving effect on bruises and injuries; or can clear away heat and detoxify, help the human body resist the invasion of heat poison, so as to regulate the body and heal diseases.
Furthermore, it also has its uses in craft decoration. The appearance of the 4-spiny dace rays is unique, and its fins, bones, etc., have a strange shape. The craftsman took it and carefully carved it to form exquisite handicrafts. Or it is an ornament, placed on the desk, to increase the elegance of the room; or it is a pendant, hanging by the side, with the beauty of decoration, showing the unique charm of marine culture, which is amazing.
In addition, the 4-acanthine-based dace ray also plays a key role in marine ecology. It is a link in the marine biological chain and is interdependent with other things. Its survival and reproduction affect the balance of marine ecology and maintain the diversity of marine organisms, which is of great significance to the stability of marine ecosystems.

4-Cyanobenzoic acid, also known as p-cyanobenzoic acid, is an important raw material in organic synthesis. Its physical properties are described in the following text:
4-cyanobenzoic acid is white to light yellow crystalline powder. Its properties are stable, and it can maintain its inherent form for a long time under normal temperature and pressure, and does not easily undergo qualitative change. The melting point is between 222-225 ° C. In this temperature range, the solid 4-cyanobenzoic acid will gradually melt into a liquid state. This property makes it possible to achieve physical state transformation under specific temperature conditions, making it easy to operate in various synthetic reactions. The boiling point of
is quite high, about 366.8 ° C. The higher boiling point means that in order to make it boil into a gaseous state, a higher temperature needs to be applied, which also indicates that the substance can still maintain the stable existence of liquid or solid state in a relatively high temperature environment.
4-cyanobenzoic acid is slightly soluble in water, because water is a highly polar solvent, and the molecular structure of 4-cyanobenzoic acid makes its polarity relatively weak. According to the principle of similar compatibility, its solubility in water is small. However, it is soluble in common organic solvents such as ethanol, ether, acetone, etc. In these organic solvents, the molecules of 4-cyanobenzoic acid and the solvent molecules can form a suitable interaction, so that they can be uniformly dispersed and dissolved. This solubility characteristic makes it possible to flexibly select suitable organic solvents for dissolution and treatment according to the reaction requirements during the organic synthesis process, so as to promote the smooth progress of the reaction.

A compound of 4-aminoquinoline carboxylic acid, with polymorphism. It contains aminoquinoline, which is acid-forming, and can be used to form acid. If it is used in manufacturing, it can improve solubility and quality. It is aromatic. Because quinoline has a large π, its properties are fixed, and it can be substituted and reversed. For example, under the appropriate conditions, the atom on quinoline can be substituted by nitro groups, atoms, etc., to synthesize derivatives containing different substituents, which can be expanded in the field of carbon and materials.
4-aminoquinoline carboxylic acid contains carboxylic groups, is acidic, and can be reacted to form alcohol. It can also be esterified and reacted by alcohol under the action of catalysis to generate ester derivatives, which can be changed to physical properties. Amino-carboxylic groups can be divided into two or more polymers, such as amino groups that can form nitrogen-containing polymers and ketones, or acylated polymers; carboxylic groups can be reacted to chlorine, acid anhydrides, etc., to expand the chemical pathway, and are used in the synthesis of chemical compounds.
In addition, 4-aminoquinoline carboxylic acids have biological activity, and some derivatives have antibacterial, anti-inflammatory, anti-disease and other biological activities. Such as chloroquine and chloroquine, which are used in the treatment of diseases and autoimmune diseases. Its chemical properties are important in the study of chemical substances, synthesis and reaction. It helps to improve the family's innovation, improve the chemical effect, reduce the toxicity, and create new compounds. In addition, 4-aminoquinoline carboxylic acids have important research values in the synthesis, chemical and other fields due to their specialization.

The synthesis method of 4-chlorobenzoic acid has various paths to follow, which are described as follows:
First, toluene is used as the starting material, and p-chlorotoluene is obtained by chlorination reaction, followed by oxidation reaction to obtain 4-chlorobenzoic acid. In this chlorination reaction, toluene can interact with chlorine gas under the condition of light or catalyst to obtain p-chlorotoluene. This step requires attention to control the reaction conditions to increase the selectivity of the product. Then, 4-chlorobenzoic acid can be obtained by oxidizing p-chlorotoluene in an acidic medium with appropriate oxidants, such as potassium permanganate, potassium dichromate, etc. The raw material of this path is easy to obtain, and the reaction steps are relatively clear. However, the oxidation process may have side reactions, which need to be carefully regulated.
Second, benzoic acid is used as the starting material for chlorination to directly synthesize 4-chlorobenzoic acid. Benzoic acid reacts with chlorine in the presence of appropriate catalysts, such as iron filings, ferric chloride, etc., and chlorine atoms can selectively replace the hydrogen atoms at the carboxyl para-position on the benzene ring to obtain the target product. This method is simple in steps, but it is necessary to pay attention to the selection and dosage of catalysts, and the control of reaction conditions is also related to the purity and yield of the product.
Third, 4-chlorobenzoic acid is prepared by oxidation reaction with p-chlorobenzaldehyde as the raw material. A mild oxidizing agent, such as manganese dioxide and hydrogen peroxide, can be used to oxidize p-chlorobenzaldehyde to 4-chlorobenzoic acid. The reaction conditions of this route are relatively mild, and the purity of the product may be higher. However, the cost of chlorobenzaldehyde may be higher. For large-scale production, the cost factor needs to be considered.
Fourth, it is synthesized by the Grignard reagent method. First, p-chlorobromobenzene is reacted with magnesium to make Grignard reagent, then reacted with carbon dioxide, and then acidified to obtain 4-chlorobenzoic acid. Although this method can effectively construct the carboxyl structure, the preparation of Grignard reagent requires an anhydrous and oxygen-free environment, and the operation requirements are relatively strict. The reaction conditions are also difficult to control.

2 -% E7% A2% 98 - 4-%E7%A1%9D%E5%9F%BA%E8%8B%AF%E8%83%BA, both storage and transportation need to be careful. This medicine has a fierce nature, and when used properly, it can heal the disease; if there is a slight difference, it will not be a heel.
When it is in existence, it is the first to place it. When choosing a dry, cool, and sheltered place, avoid the trouble of water and fire, and avoid its quality from changing. If it is placed in a humid place, it is prone to moisture and mildew, and the efficacy of the medicine is greatly reduced; if it is close to a fire candle, or it is violent due to heat, it will lose its original effect.
Second and container. When it is held in a strong and airtight device to prevent it from contacting with outside air, moisture, etc. Metal utensils, or in combination with medicine, should be made of ceramics and glass to keep them pure.
As for transporting them, you need to be especially careful. The person handling them must choose someone who is steady and cautious, who is familiar with their properties and understands their benefits. On the way, slow down and move steadily to avoid bumps and vibrations, lest they damage their quality and disrupt their properties due to earthquakes.
Furthermore, the season of transportation also needs to be considered. In the hot summer season, the weather is hot and humid, which is not conducive to their luck. It is better to choose a cool and dry time to ensure the safety of medicine.
And the transportation and the survival, all need to be sent by a special person to record their feelings in detail, when to store, where to store, when to ship, and where to go, all of which are remembered in detail, so as to detect their feelings, and in case of changes, they can also be traced back to the source, so as to avoid catastrophe. In this way, Fang Guaranteed 2-% E7% A2% 98 - 4-%E7%A1%9D%E5%9F%BA%E8%8B%AF%E8%83%BA safe and secure at the time of storage and transportation.