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What are the main uses of 2-Chloro-6-methylpyridine?
2-Chloro-6-methylpyridine is also an organic compound. It has a wide range of uses and has important applications in many fields.
In the field of pharmaceutical chemistry, this compound is often a key intermediate for the synthesis of drugs. Due to its unique chemical structure, it can undergo a series of chemical reactions to construct drug molecules with specific pharmacological activities. For example, in the synthesis of some antibacterial drugs, 2-chloro-6-methylpyridine can be used as a starting material. By chemically modifying its chlorine atom and methyl group, other functional groups are introduced, and then drugs that have inhibitory or killing effects on specific bacteria are synthesized.
In the field of pesticide chemistry, it is also an indispensable part. It can be used in the preparation of pesticides, fungicides and other pesticide products. Due to the existence of the pyridine ring, it has a certain biological activity, coupled with the electronic effect and spatial effect of chlorine atoms and methyl groups, which can enhance the effect of the compound on pests or pathogens. For example, in the development of some new insecticides, based on 2-chloro-6-methylpyridine, after structural optimization, insecticides with high efficiency, low toxicity and environmental friendliness to pests can be obtained.
Furthermore, in the field of materials science, 2-chloro-6-methylpyridine also has its uses. It can participate in the synthesis of certain functional materials, such as specific polymer materials. By polymerizing with other monomers, its structural units are introduced into the main chain or side chain of the polymer, giving the material unique properties, such as improving the stability, solubility of the material or giving it special optical and electrical properties.
In summary, 2-chloro-6-methylpyridine, with its unique chemical structure, plays a crucial role in many fields such as medicine, pesticides and materials, promoting technological development and product innovation in various fields.
What are the physical properties of 2-Chloro-6-methylpyridine?
2-Chloro-6-methylpyridine is also an organic compound. It has many physical properties and is described as follows:
Looking at its appearance, under room temperature and pressure, 2-chloro-6-methylpyridine is a colorless to light yellow liquid. Its color is pure and bright, and it can be seen that its texture is clear.
When it comes to odor, this substance emits a pungent and specific smell, which can be felt by smelling. The smell is strong. This smell is often noticeable and easy to distinguish.
The boiling point of 2-chloro-6-methylpyridine is about 172-174 ° C. When the temperature rises to the S value, it gradually changes from liquid state to gaseous state. This boiling point characteristic is quite critical in chemical operations such as separation and purification. It can be precipitated from the mixture by distillation according to this boiling point difference.
Furthermore, its melting point is about -21 ° C. When the temperature drops below the S value, 2-chloro-6-methylpyridine solidifies from liquid state to solid state. This melting point is also one of its important physical markers. It needs to be considered when storing, transporting and setting specific reaction conditions.
As for the density, it is about 1.125 g/cm ³, which is slightly heavier than water. When mixed with water, it can be seen that it sinks to the bottom of the water. This density characteristic has important guiding significance in liquid-liquid separation and related chemical reactions.
In terms of solubility, 2-chloro-6-methylpyridine is slightly soluble in water, but it can be soluble in organic solvents such as ethanol, ether, and acetone. In organic solvents, it can interact with solvent molecules and disperse uniformly. This solubility provides convenience for its application in organic synthesis, drug preparation, etc. It can often be used as a reactant or reaction medium to participate in many chemical reactions.
In addition, the vapor pressure of 2-chloro-6-methylpyridine is also fixed at a specific temperature. The vapor pressure is related to its tendency to escape in the gas phase, and has a significant impact on its concentration distribution and volatilization characteristics in a confined space. It cannot be ignored in terms of safe production and storage environment control.
In summary, the physical properties of 2-chloro-6-methylpyridine are diverse, and each property is interrelated. It is of great significance for applications in chemical, pharmaceutical and other fields. Practitioners need to know its properties in detail before they can make good use of it.
What are the chemical properties of 2-Chloro-6-methylpyridine?
2-Chloro-6-methylpyridine is an organic compound with unique chemical properties and a wide range of uses in many fields.
Let's talk about its nucleophilic substitution reaction characteristics first. In this molecule, chlorine atoms are highly active, because they are connected to the pyridine ring and are affected by the electron-withdrawing effect of nitrogen atoms on the ring, making it easier for chlorine atoms to leave. For example, under alkaline conditions, like in aqueous sodium hydroxide solutions, chlorine atoms are easily replaced by hydroxyl groups to form 2-hydroxy-6-methylpyridine. If treated with nucleophiles such as sodium alcohol, chlorine atoms will be replaced by alkoxy groups to form corresponding ether derivatives. In the nucleophilic substitution reaction, the reaction conditions are mild or not, depending on the nucleophilic strength of the nucleophilic reagent and the reaction solvent and other factors.
Let's talk about its alkalinity. The nitrogen atom of the pyridine ring has a pair of unshared electron pairs, which endows 2-chloro-6-methylpyridine with a certain alkalinity. However, due to the electron-absorbing induction effect of the chlorine atom, its alkalinity is weakened compared with that of pyridine. This compound can react with acids to form salts. For example, when reacting with hydrochloric acid, the nitrogen atom binds protons to form the corresponding hydrochloride salt. Its alkalinity plays a significant role in organic synthesis and can be used to regulate the acidity and alkalinity of the reaction system, or
In addition, 2-chloro-6-methylpyridine also has certain redox properties. Pyridine rings can be oxidized under specific conditions, but the specific oxidation products depend on the oxidizing agent used and the reaction conditions. At the same time, in some reduction reactions, the double bonds on the pyridine ring may be reduced, and the chlorine atoms and methyl substituents may also change due to different reaction conditions.
In the field of organic synthesis, 2-chloro-6-methylpyridine, as an important intermediate, is widely used in the preparation of a variety of drugs, pesticides and fine chemicals. Its unique chemical properties provide rich possibilities for the synthesis of complex organic molecules.
What are 2-Chloro-6-methylpyridine synthesis methods?
The synthesis method of 2-chloro-6-methylpyridine has been known for a long time. Common ones are obtained by chlorination with 6-methylpyridine as raw material. In this reaction, suitable chlorination reagents can be selected, such as chlorine gas, sulfuryl chloride, etc. Taking chlorine as an example, under appropriate reaction conditions, such as suitable temperature, pressure and catalyst, chlorine gas reacts with 6-methylpyridine, and chlorine atoms replace hydrogen atoms at specific positions on the pyridine ring to generate 2-chloro-6-methylpyridine. < Br >
There are also 2-methyl-6-hydroxypyridine as the starting material, and the hydroxyl group is first converted into a suitable leaving group, and then replaced by a chlorine atom. For example, the hydroxyl group is converted into a sulfonate group and other groups with good leaving properties, and then reacted with a chlorination reagent to replace the leaving group with a chlorine atom to achieve the synthesis of 2-chloro-6-methylpyridine.
Furthermore, it is also prepared by the rearrangement reaction of pyridine derivatives. First synthesize the pyridine derivative with a specific structure. Under appropriate reaction conditions, such as specific acid-base environment, temperature, etc., a rearrangement reaction occurs, and the target product 2-chloro-6-methylpyridine is generated after structural rearrangement. However, this method requires strict reaction conditions, and the operation also needs to be fine in order to obtain a product with high yield and purity.
All these synthetic methods have their own advantages and disadvantages. The chlorination reaction raw materials are common and relatively simple to operate; the substitution position can be precisely controlled by the hydroxyl conversion method; although the rearrangement reaction is complicated, it may provide a novel synthetic path. Synthesizers should weigh and choose the appropriate method according to actual needs, such as raw material availability, cost, product purity requirements, etc.
2-Chloro-6-methylpyridine What are the precautions during storage and transportation?
2-Chloro-6-methylpyridine is also an organic compound. When storing and transporting, be sure to pay attention to many matters.
First storage environment. It should be stored in a cool and ventilated warehouse, away from fires and heat sources. This cover may burn or explode due to heat or exposure to open flames of the compound. The temperature of the warehouse should be controlled within an appropriate range, not too high, to prevent its chemical properties from changing. And it should be stored separately from oxidants, acids, bases, etc., and should not be mixed. Due to contact with it, it is easy to cause chemical reactions, causing material deterioration or danger.
Furthermore, the packaging needs to be rigorous. Packaging materials should have good sealing and corrosion resistance to ensure that the compound does not leak or deteriorate during storage. If the packaging is damaged, it will not only cause material damage, but also may pollute the environment due to leakage and endanger personal safety.
As for transportation, the transportation vehicle must meet the relevant safety standards. It must be equipped with the corresponding variety and quantity of fire fighting equipment and leakage emergency treatment equipment. During driving, it is necessary to prevent exposure to the sun, rain and high temperature. Summer transportation should be carried out in the morning and evening to avoid high temperature periods. The trough (tank) car used during transportation should have a grounding chain, and holes can be set in the trough to baffle to reduce shock and generate static electricity. When loading and unloading, it should be handled lightly to prevent damage to packaging and containers. Handlers are also required to wear appropriate protective equipment, such as gas masks, gloves, etc., to protect their own safety.
In summary, the whole process of storage and transportation of 2-chloro-6-methylpyridine should strictly follow safety regulations and operate with caution to ensure personnel safety, environmental damage and material stability.