(?脿)-2-(a-Hydroxybenzyl)pyridine

(?) What is the main use of this (α-carboxylamino) group? "Tiangong Kaiwu" has a cloud:
Gaifu amino group, in the field of biochemistry, involves a wide range. α-carboxylamino group, in all kinds of biochemical reactions, really occupies the key.
The first one to bear the brunt is the construction of proteins. Proteins, as the cornerstone of biology, are responsible for all kinds of life activities. And α-carboxylamino group, is the important part of amino acids. Amino acids, by peptide bonds, come together to form proteins. The formation of peptide bonds depends on the condensation of α-carboxylic groups and amino groups, which is formed by dehydration. This process is repeated, and the chain of the protein gradually lengthens, and then folds and twists, forming a specific conformation, which has biochemical activity.
In addition, α-carboxylamino groups also have great work in the process of metabolism. Amino acids can be metabolized to produce many important things. For example, amino groups can be deaminated to generate ammonia and corresponding α-ketoacids. Ammonia is treated by the liver to form urea and excreted in vitro; α-ketoacids can enter the metabolic pathway of sugars and lipids to supply energy or be used as raw materials for synthesis.
In addition, the acid-base properties of α-carboxylamino groups contribute greatly to the stability of the environment in vivo. Its carboxyl group can release protons, which are acidic; the amino group can hold protons, which are alkaline. In this way, in the buffer system of the living body, it can adjust the acid and base of the body fluids, maintain the safety of the internal environment, and make the biochemical reaction suitable and anterograde.
Overall, α-carboxylamino groups are indispensable in the protein constitution, metabolic flow, and internal adjustment of living things, and contribute greatly to the maintenance and evolution of life.

What are the physical properties of the (? erbium) - 2 - （α - carboxyl erbium group) vector?
Between heaven and earth, everything has its own properties. (? erbium) - 2 - （α - carboxyl erbium group) vector is no exception.
This vector is stable. Under many chemical reaction environments, its structure is not easy to be damaged, and it is as stable as a rock. When external chemical factors exert influence and want to change its structure, it can resist changes and maintain its original shape and composition by virtue of its own chemical health characteristics. This is a sign of chemical stability.
Furthermore, its conductivity is unique. Under certain conditions, electrons can move smoothly within the vector structure, just like water flowing in a ditch. This electrical conductivity may find a place in the fields of electronic devices, conductive materials, etc. And its conductivity can vary with external conditions, such as temperature, electric field strength, etc. This variability provides many possibilities for its application in different scenarios.
Thermal stability is also an important physical property. When heated, its structure can withstand a certain temperature range without significant change. Like a high-temperature armor, it can ensure the stability of its own properties under a certain high temperature environment, and will not rapidly decompose or change the physical state due to temperature rise. This property makes this vector potentially valuable in high temperature-related industrial production and material applications.
In addition, this vector may have special optical properties. When light shines on it, unique reflection, refraction or absorption phenomena can occur. Just like a prism decomposes light, it may have different responses to different wavelengths of light. This optical property may play a key role in the fields of optical instruments, optical signal processing, etc.

What are the chemical properties of (? guanidine) - 2 - （α - furanoyl)? Let me explain it to you in the classical Chinese form of "Tiangong Kaiwu".
This (? guanidine) - 2 - （α - furanoyl) is quite unique in its properties. In the chemical environment, when it is heated, if it is in a specific atmosphere, it may decompose. Due to the part containing (? guanidine) in the molecular structure, this structure has a certain alkalinity. In acidic media, it may neutralize with acids and form corresponding salts. < Br >
And its (α-furanoyl) part, the furan ring is aromatic, but it is different from the benzene ring. This part is vulnerable to attack by electrophilic reagents, and under appropriate conditions, electrophilic substitution reactions can occur, such as halogenation, nitrification, etc. And the presence of formyl groups makes it possible to participate in a variety of condensation reactions, such as with compounds containing active hydrogen, or condensation can occur, and then form new carbon-carbon bonds or carbon-hetero bonds.
In the category of redox, the carbonyl group in (α-furanoyl) can be reduced. If a suitable reducing agent is used, it can be reduced to alcohol hydroxyl groups. On the contrary, if a strong oxidant is encountered, the furan ring may be damaged, resulting in an oxidation and ring-opening reaction.
Because of its overall structural characteristics, it can be used as a key intermediate in the field of organic synthesis. With ingeniously designed reaction paths, it can derive many organic compounds with different functional groups and structures, and may have potential applications in many fields such as pharmaceutical chemistry and materials chemistry.

There are three ways to combine (? peptide) and (α-formylglycyl).
First, the method of condensation. Select a condensation agent, such as carbodiimide, to make the carboxyl group of (? peptide) and the amino group of (α-formylglycyl) condensate. First adjust the pH of the reaction system to reach a suitable environment, followed by the addition of the condensation agent, temperature control and time. This process also, the condensation agent activates the carboxyl group and promotes its nucleophilic substitution with the amino group to form a peptide bond. If dicyclohexyl carbodiimide (DCC) is used, dichloromethane is often used as a solvent, and DCC and (? The carboxyl group of the peptide) is reacted for a while, and then the amino group component of (α-formylglycyl) is added, and it is gradually warmed to room temperature. After a few years, the product can be obtained. However, dicyclohexylurea, a by-product of DCC, is difficult to remove, and 1- (3-dimethylaminopropyl) -3-ethylcarbodiimide hydrochloride (EDC · HCl) can be used instead. The by-product is water-soluble and easy to remove.
Second, the activation ester method. Convert the carboxyl group of (? peptide) into an active ester, such as p-nitrophenyl ester, pentafluorophenyl ester, etc. First, the carboxyl group of (? peptide) is made into an ester with a suitable reagent, and then reacts Taking p-nitrophenyl ester as an example, (? peptide) reacts with p-nitrophenol and condensing agent to obtain the active intermediate of p-nitrophenyl ester, and then mixes with (α-formylglycyl) to react in buffer solution. P-nitrophenoxy is a good leaving group, and the amino group attacks the ester carbonyl to form a peptide bond. This process has mild conditions, few side reactions, and high product purity.
Third, solid-phase synthesis method. Taking the solid-phase carrier as the base, first fix (α-formylglycyl) on the carrier, and then add the amino acid units of (? peptide) in sequence. By means of the protection group strategy, prevent side reactions. For example, the (α-formylglycyl) amino group is first protected by Fmoc (9-fluorene methoxycarbonyl), and the carboxyl group is connected to the solid-phase carrier. After deFmoc, add the activated (? peptide) amino acid, condensation reaction, and repeat the operation to obtain the target product. Solid-phase synthesis has a high degree of automation, the product is easy to separate and purify, and it is suitable for large-scale preparation.

Look at what you are asking, it is related to the market price range of (? erbium), and also mentioned (α-carboxypyridyl) things. These two are in the market, and the price range is difficult to determine a definite number, and it varies for many reasons.
The price of the husband's market, supply and demand are the main factors. If (? erbium) is in the market and there are few suppliers, its price will rise; on the contrary, if supply exceeds demand, the price will drop. And the quality of its quality is also related to the price. Those who are of high quality are willing to get it at a high price; those who are inferior in quality, the price will be low.
As for (α-carboxypyridyl), the same principle is followed. And the two may have different prices due to different origins and production methods. The place of origin is easy, the system is simple and economical, and the price may be slightly lower; if the place of origin is remote and the system is difficult, the price will be higher.
The situation of the city is changing rapidly, and current events and decrees can affect it. The current government orders help its production, or the city's demand changes suddenly, and the price will follow.
Therefore, if you want to know the market price range of (? erbium) and (α-carboxylpyridyl), you need to check the supply and demand of the city, the quality of the quality, the origin system and the current affairs of the government.