2-Thiophenecarboxylicacid, 3-borono-

2-%E5%99%BB%E5%90%A9%E7%BE%A7%E9%85%B8%EF%BC%8C3-%E7%A1%BC%E9%85%B8%E7%9A%84%E4%B8%BB%E8%A6%81%E7%94%A8%E9%80%94%E6%98%AF%E4%BB%80%E4%B9%88%EF%BC%9F
2-pentenedioic acid and 3-adipic acid are all acid compounds, and their main uses are significant.
2-pentenedioic acid is widely used in the field of chemical synthesis. First, it can be used to synthesize special polymers. Because its molecules contain carboxyl groups and carboxyl groups, this functional property allows it to be polymerized and reversed, and other polymers with special properties. This polymer can be used in the manufacture of high-performance engineering plastics. It is widely used in high-end engineering plastics such as aerospace and automotive manufacturing. Second, it is also indispensable in the synthesis of plastics. It can be used for the construction of polyamide molecules in China, assist in the synthesis of compounds with specific biological activities, and provide important raw material bases for new research.
As for 3-adipic acid, its application is also universal. First, its core position in nylon production. 3-adipic acid-hexanediamine polyreactive acid, can generate nylon-66, which is an important synthesis in the work. Nylon-66 has high hardness, good wear resistance, good performance, etc., and is widely used in various fields, such as clothing, clothing, cloth, etc. Furthermore, 3-adipic acid also plays an important role in plasticizing. The resulting plasticizer can effectively improve the flexibility, plasticity, and processing performance of plastics, making plastics more suitable for various needs. For example, in polyvinyl chloride (PVC) products, this plasticizer is widely used. In addition, in the raw material industry, 3-adipic acid can be used in synthetic polyester resin materials. The resin material has good adhesion, resistance, and luminosity, and is widely used in the protection of gold, wood, and other materials.

2-% pentanoic acid and 3-butyric acid are both organic compounds, each with unique physical properties.
2-pentanoic acid is a compound containing ketone groups and carboxyl groups. It is mostly liquid at room temperature and pressure. Because it contains carboxyl groups, it has certain acidity and can neutralize with bases to form corresponding carboxylic salts and water. Because it contains carbonyl and carboxyl groups, these two are polar groups, resulting in 2-pentanoic acid being soluble in polar solvents such as water and ethanol, and because hydrogen bonds can be formed between molecules, the boiling point is relatively high. With the chemical activity of carbonyl and carboxyl groups, 2-pentanoic acid can participate in many organic reactions, such as esterification reaction, nucleophilic addition reaction, etc., and has a wide range of uses in the field of organic synthesis.
3-butyric acid, also known as butyric acid, is a colorless oily liquid at room temperature, with a pungent rancid odor. Its acidity is derived from carboxyl groups and can react with metals, bases, etc. 3-butyric acid can also be esterified with alcohols to form butyrate esters. Such esters often have a special fragrance and can be used in the fragrance industry. In terms of solubility, 3-butyric acid is partially miscible with water and has good solubility in organic solvents such as ethanol and ethyl ether. This is because the carboxyl group at one end of the molecule is hydrophilic, while the carbon chain In terms of physical constants, 3-butyric acid has a boiling point of about 163.5 ° C, a melting point of -7.9 ° C, and a relative density of 0.9587 (20/4 ° C). Its density is slightly lower than that of water, and its volatility is stronger than that of some higher fatty acids.
In summary, although both 2-pentanoic acid and 3-butyric acid contain carboxyl groups, they have similarities in acidity and partial reactivity, but due to differences in molecular structure, there are significant differences in physical properties such as odor, solubility, and boiling point.

2-%E5%99%BB%E5%90%A9%E7%BE%A7%E9%85%B8%E4%B8%8E3-%E7%A1%BC%E9%85%B8%E4%B8%80%E7%B1%BB%E7%BA%A7%E4%B8%BA%E5%85%89%E6%95%88%E5%8C%96%E5%AD%A6%E5%89%82%EF%BC%8C%E5%85%B6%E5%8C%96%E5%AD%A6%E6%80%A7%E8%B4%A8%E5%9C%A8%E4%B8%80%E5%AE%9A%E6%9D%A1%E4%BB%B6%E4%B8%8B%E5%8F%AF%E8%83%BD%E4%B8%8D%E5%A4%AA%E7%A8%B3%E5%AE%9A%E3%80%82
2-%E5%99%BB%E5%90%A9%E7%BE%A7%E9%85%B8%EF%BC%8C%E5%8F%88%E7%A7%B0%E5%99%BB%E5%90%A9%E7%BE%A7%E9%85%B8%E7%94%B2%E9%85%B5%EF%BC%8C%E5%85%B6%E5%8C%96%E5%AD%A6%E5%BC%8F%E4%B8%BA C H O. This substance is photosensitive, and may undergo chemical reactions and deteriorate under conditions such as light, heat, and air. For example, under light, it may cause intra-molecular structural changes, causing changes in its chemical properties and affecting its original efficacy.
3-%E7%A1%BC%E9%85%B8%EF%BC%8C%E5%8F%88%E7%A7%B0%E3%80%8A%E4%B8%89%E7%A1%BC%E9%85%B8%E4%B8%80%E7%BC%96%E3%80%8B%EF%BC%8C%E5%85%B6%E5%8C%96%E5%AD%A6%E5%BC%8F%E4%B8%BA C H O. Also as a photosensitive compound, it is more sensitive to light. Under the action of light, it may produce a photolysis reaction, decompose into other substances, and then change its chemical properties and composition. In practical application and storage, if you do not pay attention to conditions such as light avoidance, the content of its active ingredients will decrease, affecting the use effect.
In summary, 2-%E5%99%BB%E5%90%A9%E7%BE%A7%E9%85%B8%E4%B8%8E3-%E7%A1%BC%E9%85%B8%E7%9A%84%E5%8C%96%E5%AD%A6%E6%80%A7%E8%B4%A8%E5%9C%A8%E6%97%A0%E9%99%A4%E6%96%BD%E5%A4%87%E7%9A%84%E6%83%85%E5%86%B5%E4%B8%8B%E4%B8%8D%E5%A4%AA%E7%A8%B3%E5%AE%9A%EF%BC%8C%E5%85%B6%E5%AF%BC%E8%87%B4%E5%8F%98%E8%B4%A8%E7%9A%84%E4%B8%BB%E8%A6%81%E5%8E%9F%E5%9B%A0%E4%B8%BA%E5%85%89%E5%8F%8A%E7%83%AD%E7%AD%89%E5%91%A8%E5%9B%B4%E6%9D%A1%E4%BB%B6%E7%9A%84%E5%BD%B1%E5%93%8D%E3%80%82 the storage and use of such substances, it is necessary to properly take protective measures such as protection from light and low temperature to maintain the relative stability of their chemical properties.

To prepare 2-valerynic acid and 3-hexyne acid, the method is as follows:
** Method for preparing 2-valerynic acid **:
First take propane and make it react with sodium metal in liquid ammonia to obtain sodium propane. Sodium propane has strong nucleophilicity. Then take ethyl bromoacetate and slowly drop it into the system containing sodium propane. The alkynyl carbon of sodium propane attacks the carbonyl carbon of ethyl bromoacetate nucleophilically, and the bromine ion leaves to obtain an alkynyl-substituted ester. This step of the reaction needs to be carried out in an anhydrous and low temperature environment to prevent side reactions. Thereafter, the ester is hydrolyzed with dilute alkali solution to obtain the corresponding carboxylate. Finally, an appropriate amount of strong acid is added to adjust the pH to acidic, so that the carboxylate is converted into 2-valerynic acid, and then purified by distillation, extraction, etc., to obtain pure 2-valerynic acid.
** Method of preparing 3-hexyne acid **:
First take 1-butyne, and also react with sodium metal in liquid ammonia to obtain 1-butyne sodium. Another ethyl bromopropionate is taken, and the solution of 1-butyne sodium is slowly added to the reaction flask containing ethyl bromopropionate. The alkynyl group of 1-butyne sodium attacks the carbonyl carbon of ethyl bromopropionate, forming a new carbon-carbon bond to form an alkynyl-substituted ester product. This process also requires anhydrous and low temperature conditions. Then, the ester is hydrolyzed with alkali solution to obtain carboxylic acid. Then acidified with strong acid, the carboxylic acid is changed to 3-hexyne acid. Finally, high-purity 3-hexyne acid can be obtained by recrystallization or distillation.
The key to the synthesis of these two lies in the preparation of sodium acetylene and its nucleophilic substitution reaction with halogenated esters. The hydrolysis and acidification steps also need to precisely control the conditions to obtain the target product.

2-%E5%99%BB%E5%90%A9%E7%BE%A7%E9%85%B8%EF%BC%8C3-%E7%A1%BC%E9%85%B8%E4%B8%8E%E5%B8%82%E5%9C%BA%E4%BB%B7%E6%A0%BC
In today's market, the price of 2-hydroxybutyric acid and 3-chloropropionic acid varies with the supply and demand of the market and the quality of the quality, and it is difficult to determine its value.
The state of the city is that supply and demand are the price of the cardinal. If there are many people in need of this product, but there are few suppliers, the price will increase; conversely, if the supply exceeds demand, the price will decrease. And the quality of coarse is also the main reason for the price. Those with good quality often have higher prices than those with poor quality.
As for 2-hydroxybutyric acid, it is useful in chemical industries and other fields. In the city, if the production method is good, the quality is pure and less miscellaneous, and the current industry uses a lot, its price may be higher, and the price per kilogram may be around 100 yuan. However, when the supply and demand are low, the price may also drop to tens of yuan.
3-chloropropionic acid, also used in chemical synthesis, etc. If the city is prosperous, the quantity of production is appropriate, and the quality is up to standard, the price per kilogram may be around 150 yuan. However, if the production increases greatly, and the demand does not follow, the price may drop to within 100 yuan.
It is necessary that the price of the two in the market is often in change. It is for businesspeople to observe the movement of the market, supply and demand in time, and make profits by knowing the change of price.