2,3-dichloro-5-iodopyridine

2% 2C3-dideuterium-5-chloropyridine, which is in the scope of "Tiangongkai", is mostly used in pharmaceuticals, organic synthesis and other fields.
In pharmaceuticals, it can be used as a key intermediate. Through a series of chemical reactions, it can be cleverly spliced with other compounds to construct complex drug molecules with specific pharmacological activities. Taking the preparation of a new type of antibacterial drug as an example, 2% 2C3-dideuterium-5-chloropyridine is involved. Through multi-step reactions, it endows the drug with precise antibacterial targeting and efficient antibacterial ability, which can more effectively inhibit the growth and reproduction of pathogens and help patients recover.
In the field of organic synthesis, it is like a delicate key to open the door to the synthesis of many organic compounds. Due to its unique chemical structure, it can be used as a starting material, and it can undergo a variety of reaction types such as halogenation, substitution, and addition to generate organic materials with complex structures and specific functions. For example, when synthesizing a new class of optoelectronic materials, 2% 2C3-dideuterium-5-chloropyridine is used as a core starting material, which is synthesized and modified in multiple steps to endow the material with excellent photoelectric conversion properties, showing broad application prospects in cutting-edge fields such as new display technologies and optoelectronic devices.
Therefore, with its unique chemical properties, 2% 2C3-dideuterium-5-chloropyridine plays an indispensable and important role in the field of pharmaceuticals and organic synthesis, driving related industries to new heights, and contributing to human health and well-being and scientific and technological progress.

2% 2C3 -dideuterium-5 -chloropyridine is an organic compound. Its physical properties are as follows:
- ** Appearance and Properties **: Under normal temperature, it is mostly colorless to light yellow liquid or solid, depending on the purity and environmental conditions. Due to the structure of chlorine atoms and pyridine rings, some products may have a special odor.
- ** Melting boiling point **: Melting point is about -48 ° C, boiling point is about 189-190 ° C. The melting boiling point has a specific range due to intermolecular forces and structures. For example, compared with compounds with similar structures, the conjugation system of pyridine rings and the electronegativity of chlorine atoms have an effect on the melting boiling point. < Br > - ** Solubility **: Slightly soluble in water, due to the polarity of the pyridine ring, the electronegativity of the chlorine atom is large, but the overall organic structure accounts for a large proportion, resulting in its limited solubility in water; soluble in common organic solvents, such as ethanol, ether, acetone, etc. Due to the principle of similar phase solubility, the organic solvent is similar to the compound structure and can be effectively dispersed and dissolved.
- ** Density **: The relative density (water = 1) is about 1.288 (20 ° C). Due to the type, number and arrangement of atoms in the molecule, its density is different from that of water. This property is important when it comes to mixing, separation, etc. < Br > - ** Stability **: Stable under normal conditions, but in case of open flame, hot topic flammable, and strong oxidant can react. Although the pyridine ring is relatively stable, chlorine atoms can participate in the reaction under specific conditions, affecting its stability.

2% 2C3-difluoro-5-cyanopyridine is a special organic compound with important uses in many fields. Its chemical properties are unique and are described in detail by you.
First of all, its stability. The molecular structure of 2% 2C3-difluoro-5-cyanopyridine endows it with certain chemical stability. Due to the specific arrangement of chemical bonds in the molecule, it is difficult to spontaneously react chemically under normal conditions. This stability brings convenience to its storage and transportation. In normal environments, it can be maintained for a relatively long time without significant changes.
Second discussion on its reactivity. Although it has certain stability, 2% 2C3-difluoro-5-cyanopyridine also exhibits considerable reactivity under certain conditions. Cyanyl (-CN) is an important activity check point for this compound. Cyanyl has strong electron-absorbing properties, which can change the electron cloud density distribution on the pyridine ring, thereby affecting the reactivity of the entire molecule. For example, in nucleophilic substitution reactions, cyanyl groups can attract nucleophiles to attack, and a series of substitution reactions can occur to generate various derivatives. This property makes it an important intermediate in the field of organic synthesis.
Furthermore, the introduction of fluorine atoms also has a significant impact on its chemical properties. Fluorine atoms are highly electronegative. The fluorine atoms in 2% 2C3-difluoro-5-cyanopyridine can enhance the polarity of molecules, which in turn affects their physical and chemical properties. At the same time, the existence of fluorine atoms can change the molecular spatial structure and affect the interaction between molecules. In some reactions, it can guide the reaction in a specific direction and improve the reaction selectivity.
In addition, the chemical properties of 2% 2C3-difluoro-5-cyanopyridine in acid-base environments are also worthy of attention. In acidic or basic conditions, its molecular structure may change, triggering reactions such as hydrolysis and addition. This property requires careful control of the pH of the reaction environment when using and handling the compound to ensure that the reaction proceeds in the expected direction.
2% 2C3-difluoro-5-cyanopyridine has wide application prospects in the fields of medicine, pesticides, materials science and other fields due to its unique chemical properties. It is indeed a compound of great research value in the field of organic chemistry.

2% 2C3-difluoro-5-chloropyridine is a key intermediate in the field of organic synthesis, and is widely used in many fields such as pesticides and medicine. Its synthesis methods are diverse, and the following are several common methods:
First, halopyridine method. Halopyridine is used as the starting material to introduce fluorine atoms through nucleophilic substitution reaction. For example, 2,3-dichloro-5-chloropyridine is used as a substrate, and in the presence of a specific organic solvent and a base, it reacts with fluorinated reagents, such as potassium fluoride, at a suitable temperature. After the nucleophilic substitution process, the chlorine atom is replaced by the fluorine atom, and then 2,3-difluoro-5-chloropyridine is prepared. The key to this method is to select suitable reaction conditions to improve the selectivity and yield of the reaction. Factors such as the type of organic solvent, the strength and dosage of the base, the reaction temperature and time all have a great influence on the reaction effect.
Second, the pyridine derivative method. A specific pyridine derivative is used as the starting material to achieve the construction of the target product through a multi-step reaction. For example, a pyridine derivative containing a suitable substituent is used as the starting material, and the functional group is first converted, and then the reaction steps such as halogenation and fluorination are prepared. This approach requires fine design of the reaction route and strict control of the conditions of each step to ensure the smooth progress of each step of the reaction and high selectivity, so as to efficiently synthesize the target product.
Third, transition metal catalysis. The coupling reaction catalyzed by transition metal catalysts such as palladium and copper is used to realize the introduction of fluorine atoms and the construction or modification of pyridine rings. For example, fluorine atoms can be precisely introduced into a specific location in the pyridine ring through the coupling reaction of a palladium-catalyzed aryl halide with a fluorinated reagent. This method relies on high-efficiency transition metal catalysts and ligands. The reaction conditions are relatively mild and highly selective, but the catalyst cost may be higher, and the reaction equipment and operation requirements are also stricter.
Different synthesis methods have their own advantages and disadvantages. In practical applications, the most suitable synthesis method should be selected based on the availability of raw materials, cost, operability of reaction conditions, and purity and yield requirements of the target product.

2% 2C3-difluoro-5-chloropyridine is an important organic compound that is widely used in medicine, pesticides and other fields. However, its market price fluctuates due to factors such as quality, purity, supply and demand.
In terms of quality and purity, high purity is expensive. If used in high-end pharmaceutical synthesis, extremely high purity is required, and its price can reach hundreds or even thousands of yuan per kilogram. The purity is slightly lower, and the price is only tens to hundreds of yuan per kilogram for ordinary pesticide production.
The relationship between supply and demand is also key. If the market demand is strong and the production supply is limited, the price will rise; if there is excess capacity and the demand is weak, the price will fall.
In addition, market prices are also affected by raw material costs, production process complexity, transportation costs, etc. Rising raw material prices, high costs due to complex production processes, or increased transportation costs will all increase the price of 2% 2C3-difluoro-5-chloropyridine.
Overall, the market price of 2% 2C3-difluoro-5-chloropyridine ranges from tens to thousands of yuan per kilogram, depending on the actual market conditions.