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3-pyridinecarboxylic chemical structure of Acid, 2-fluoro-4-iodo-, Methyl Ester
This is the chemical structure analysis of methyl 2-fluoro-4-iodine-3-pyridinecarboxylate.
Looking at its naming, it can be seen that this compound contains a pyridine ring, which is a six-membered heterocycle with a nitrogen atom in the ring accounting for one corner. At the 3rd position of the pyridine ring, there is a methyl formate group, namely - COOCH, which is formed by connecting a carbonyl group (C = O) with a methoxy group (-OCH). Carbonyl is electrophilic and plays a key role in many chemical reactions.
In the second position of the pyridine ring, there are fluorine atoms, and the fluorine atoms are extremely electronegative. The electron cloud distribution of the pyridine ring can be affected by induction effect, which reduces the electron cloud density on the ring, thereby affecting the chemical activity and physical properties of the compound.
In the fourth position of the pyridine ring, there are iodine atoms. Although the electronegativity of the iodine atom is not as good as that of the fluorine atom, its atomic radius is larger, and it will also affect the spatial structure and electron cloud distribution of the molecule.
In the structure of this compound, the pyridine ring is the core, and the substitution of fluorine, iodine atom and methyl formate group gives it unique chemical properties. Fluorine atoms can enhance the lipophilicity of molecules. Iodine atoms may exhibit special spatial and electronic effects in chemical reactions due to their large atomic radius. Methyl formate groups can participate in many reactions such as hydrolysis and esterification, which is of great significance in the field of organic synthesis.
In summary, the chemical structure of 2-fluoro-4-iodine-3-pyridine methyl formate is composed of fluorine and iodine atoms at specific positions on the pyridine ring and methyl formate groups. The interaction of each part determines its unique chemical and physical properties.
What are the physical properties of 3-pyridinecarboxylic Acid, 2-fluoro-4-iodo-, Methyl Ester
3-Pyridinecarboxylic acid, 2-fluoro-4-iodo-, methyl ester, the physical properties of this compound are as follows:
Under normal temperature and pressure, it is mostly colorless to light yellow liquid, or white to off-white solid. The specific morphology often varies according to the environmental conditions.
When it comes to melting point, due to the existence of halogen atoms such as fluorine and iodine and ester groups in the molecular structure, the intermolecular force is more complicated, and its melting point is roughly within a specific range. However, the exact value will vary slightly due to factors such as impurity content.
In terms of boiling point, the boiling point of this compound is usually in a relatively high range due to its molecular weight and the existence of various forces between molecules. The pyridine ring, halogen atom and ester group in the molecule work together to enhance the intermolecular attraction, resulting in an increase in boiling point.
In terms of density, the density is higher than that of common light organic solvents due to its molecular composition and structure. The relative atomic weight of iodine atoms in the molecule is relatively large, which contributes significantly to the overall density, so that the density of the substance presents a specific value.
In terms of solubility, in view of the fact that its structure contains both polar ester groups and pyridine rings, as well as non-polar halogenated aromatic ring parts, in polar organic solvents such as methanol, ethanol, and acetone, there is a certain solubility, because polar groups can form intermolecular forces with polar solvents; while in non-polar organic solvents such as n-hexane and benzene, the solubility is relatively small, because the non-polar part interacts weakly with non-polar solvents.
In addition, the compound is relatively stable under normal conditions, but under specific conditions, such as high temperature, strong acid, and strong alkali environments, ester groups may undergo reactions such as hydrolysis, which in turn leads to changes in their physical properties. Its vapor pressure is relatively low and its volatility is not strong, which is related to the strong intermolecular forces. These physical properties have important guiding significance for the selection of its separation, purification, storage and reaction conditions in the fields of organic synthesis, drug development and other fields.
What are the main uses of 3-pyridinecarboxylic Acid, 2-fluoro-4-iodo-, Methyl Ester
Methyl 2-fluoro-4-iodine-3-pyridinecarboxylate has a wide range of uses. In the field of medicinal chemistry, it is a key intermediate for the synthesis of many specific drugs. The unique structure of the Gainpyridine ring and the introduction of fluorine, iodine and other atoms endow the molecule with specific activity and pharmacological properties. On this basis, complex drug molecular structures can be built through a series of reactions, and it is expected to develop innovative drugs for specific diseases, such as anti-tumor, anti-virus, etc.
In the field of materials science, it also has important value. With its own chemical properties, it can participate in the material synthesis process and optimize the properties of materials. For example, when used to prepare functional polymer materials, the electrical, optical or thermal properties of the material can be adjusted to meet the needs of different application scenarios, such as electronic devices, optical sensors and other fields.
In the field of organic synthetic chemistry, as an important building block for organic synthesis, it provides an effective path for the construction of complex organic compounds. Chemists can control their functional groups to carry out diverse reactions, such as coupling reactions, substitution reactions, etc., to expand the structural diversity of organic compounds, contribute to the development of organic synthetic chemistry, and help explore more novel organic compound structures and properties.
3-pyridinecarboxylic Acid, 2-fluoro-4-iodo-, Methyl Ester
The method of synthesizing methyl 2-fluoro-4-iodine-3-pyridinecarboxylate can follow the following methods.
First, start with 2-fluoro-4-iodine-3-pyridinecarboxylic acid, and make it react with methanol under the action of catalyst by esterification. First take an appropriate amount of 2-fluoro-4-iodine-3-pyridinecarboxylic acid and place it in the reactor, add an appropriate amount of methanol as the solvent, and then add a few drops of concentrated sulfuric acid or p-toluenesulfonic acid as an acidic catalyst. Heat up to a suitable temperature, usually between 60-80 ° C, when stirring for the number of refluxes. After the reaction is completed, the reaction solution is cooled, neutralized to neutral in sodium bicarbonate solution, extracted with an organic solvent such as ethyl acetate, the organic phase is collected, dried with anhydrous sodium sulfate, the solvent is removed by rotary evaporation, and purified by column chromatography to obtain pure 2-fluoro-4-iodine-3-methylpyridinecarboxylate.
Second, starting from a suitable pyridine derivative, it is prepared by a multi-step reaction of halogenation, carboxylation and esterification. First select a suitable unhalogenated pyridine substrate, use an iodine source and a fluorine source, and carry out halogenation under suitable reaction conditions, so that fluorine and iodine atoms are introduced into the pyridine ring at specific positions. Next, the halogenated product is treated with metal-organic reagents such as Grignard reagent or lithium reagent, and then reacted with carbon dioxide to achieve carboxylation to obtain 2-fluoro-4-iodine-3-pyridinecarboxylic acid. Finally, according to the above esterification method, it is reacted with methanol to form an ester.
Third, the coupling reaction is catalyzed by transition metals. Using a pyridine derivative containing a suitable substituent as a raw material, halogenation reactions are carried out with iodine reagents and fluorine reagents under the action of a transition metal catalyst such as a palladium catalyst to obtain 2-fluoro-4-iodine pyridine derivatives. Methyl 2-fluoro-4-iodine-3-pyridinecarboxylate was synthesized directly by carbonylation and esterification with carbon monoxide and methanol catalyzed by transition metals. In this way, the reaction conditions, such as temperature, pressure and catalyst dosage, need to be strictly controlled to achieve the ideal yield and selectivity.
3-pyridinecarboxylic Acid, 2-fluoro-4-iodo-, Methyl Ester What are the precautions in storage and transportation
3-Pyridinecarboxylic acid, 2-fluoro-4-iodine-methyl ester. When storing and transporting this material, many matters need to be paid attention to.
Bear the brunt, because of its chemical properties, it must be stored in a cool, dry and well-ventilated place. Do not place it in a high temperature or humid place to prevent it from mutating due to environmental discomfort, or even triggering chemical reactions. High temperature can easily change the activity of the substance, and humidity may cause it to be hydrolyzed by moisture.
When transporting, the packaging must be strong and tight. This is to prevent the package from being damaged due to bumps and collisions during transportation, which may lead to leakage. Leakage will not only wear and tear the goods, but also pose a threat to the environment and the safety of transporters.
Furthermore, this substance may have certain chemical hazards. Storage and transportation personnel must be professionally trained to be familiar with its characteristics and emergency response methods. In case of emergencies, such as leaks, they can respond quickly and correctly to reduce hazards.
In addition, relevant regulations and standards should be strictly followed. Whether it is the setting of storage conditions or the transportation process specifications, they must meet the requirements of the country and the industry. Do not act recklessly and cause potential safety hazards. In this way, we must ensure the safety of 3-pyridinecarboxylic acid, 2-fluoro-4-iodine -, and methyl ester during storage and transportation.
