3-Chlorothiophene-2-carbonyl chloride

3-Chloropropane-2-methylchloropropane, both of which are organic halides. Among them, 2-methylchloropropane, also known as isobutyl chloride, is a colorless and transparent liquid with a special odor.
Its physical properties are as follows: the boiling point is about 68.5 ° C, the relative density (water = 1) is about 0.87, slightly soluble in water, and miscible in most organic solvents such as ethanol, ether, and chloroform. The vapor of 2-methylchloropropane is heavier than air, and can be diffused at a lower place to a considerable distance. In case of fire, it will ignite and backfire. Its flash point is low, about -10 ° C. It is a flammable liquid and can easily cause combustion when exposed to hot topics, open flames, and strong oxidants. 3-Chloropropane is a colorless liquid with an odor similar to chloroform. The boiling point is about 76-78 ° C, and the relative density (water = 1) is about 0.89. It is also slightly soluble in water and can be miscible with ethanol, ether, acetone, etc. Its vapor and air can form an explosive mixture, which can cause combustion and explosion in case of open flame and high heat, and can react strongly with oxidants. Its flash point is about -32 ° C, which is lower than 2-methylchloropropane, more flammable, and highly dangerous.
Due to their chlorine-containing atoms, they are chemically active and can participate in a variety of organic reactions, such as substitution reactions and elimination reactions. They are widely used in the field of organic synthesis. However, due to its flammability and volatility, special attention must be paid to safety measures such as fire prevention, explosion prevention, and ventilation when using and storing.

3 - cyanoic acid - 2 - methyl cyanide, that is, methyl cyanide, chemical formula\ (CH_3CN\), also acetonitrile. Its chemical properties are as follows:
- ** Acid properties **: In acetonitrile molecules, acetonitrile has a certain degree of weak acidity due to the action of the absorber of cyanide (\ (-CN\)). However, under normal conditions, its acidity is weak, so as to show the clear acid properties. In the environment, acetonitrile can generate deradicalization reactions, generating a co-nucleation of the phase. This co-nucleation has a certain degree of nucleation and is capable of multi-nucleation substitution reactions. < Br > - ** Nucleosubstituted antidote: The cyanocarbon atom of acetonitrile is partially positively charged and susceptible to the attack of the nucleotide. For example, the cyanide group is first hydrolyzed to form an amide under acid or catalysis, and the cyanide group can be hydrolyzed to form carboxylic acids and ammonia. If in an acidic component, amide is first generated, and carboxylic acids are hydrolyzed in one step; in an acidic component, carboxylic acids and ammonia are formed.
- ** Addition antidote **: The carbon and nitrogen trioxide in the cyanide group can be added to form antidotes. In the presence of catalysis, it can be added to generate antidotes, and amines can be gradually formed, and amines can be obtained by adding amines. For example, under suitable catalysis and antidotes, acetonitrile can be added to form ethylamines. In addition, acetonitrile can also generate some additive reactions, such as additive reactions, to form a phase of ethyl amines. This compound is an important medium in the synthesis of acetonitrile.
- ** Oxidation reaction **: Acetonitrile can be oxidized by oxidation. For example, under the action of oxidation such as high acid, the cyanyl group can be oxidized to form carbon dioxide, nitrogen oxides, etc. If the reaction is appropriate and controlled, the cyanyl group can also be partially oxidized to form amides and other oxides.

The main use of 3-cyanoic acid-2-methylcyanoic acid is in the field of chemical engineering and engineering.
At the end of the synthesis, methylcyanoic acid can be used as an important part of the synthesis. Due to its unique chemical activity, it can generate many reactions. For example, in some special compounds, methylcyanoic acid can be used to generate additions, substitutions, and other reactions from specific reactions. This is a synthetic reaction that is often used in the early stage of chemical research.
In terms of industrial applications, one of them has a position in the manufacture of plastics and lipids. Methylcyanoic acid can be used as a raw material for the synthesis of some high-performance plastics and lipids. Polymerization and other processes, can be made of cyanuric acid with special properties of polymer materials, this material or with mechanical properties, chemical corrosion resistance and other characteristics, widely used in aerospace, automotive manufacturing and other high-end engineering fields, in order to meet the stringent requirements of its material properties.
Second, in the engineering work, the compound of cyanuric acid phase can be used in the synthesis of raw materials. The synthetic material from it may have good adhesion, wear resistance and weather resistance, etc., which can effectively protect the surface of the coating, improve the external properties of the object and the use of the material.
Third, in the field, cyanuric acid can be used as a raw material for the synthesis of some active ingredients. The synthesized product has an efficient control effect on specific diseases, helps to manage diseases and ensure the quality of crops.

3-Fenvalerate-2-fenvalerate is a common pesticide component, and there are many synthesis methods. The following are the common ones:
** 1. Esterification method **
This is a common method for synthesizing fenvalerate and fenvalerate. Taking fenvalerate as an example, the corresponding acid and alcohol need to be prepared. When preparing acids, halogenated aromatics are often used as starting materials, and cyanide-containing carboxylic acids are obtained through multi-step reactions. For example, p-chlorobenzaldehyde is used as a raw material, and diethyl malonate is first reacted with diethyl malonate under alkaline conditions to form a substituted diethyl malonate derivative. After hydrolysis and decarboxylation, cyanide-containing carboxylic acids can be obtained. When
preparing alcohols, isophenoxy benzaldehyde is used as a raw material, reacted with a specific Grignard reagent, and then properly treated to obtain the corresponding alcohol. Finally, the resulting acid and alcohol are esterified in the presence of a catalyst to obtain fenvalerate. For the synthesis of fenvalerate, a similar esterification reaction path is also followed, and the corresponding acid and alcohol are reacted under suitable conditions.
** 2. Acyl chloride method **
The compound containing carboxyl groups is first made into an acid chloride. This process often treats carboxylic acids with chlorination reagents such as dichlorosulfoxide. Taking the synthesis of fenvalerate as an example, the corresponding acid chloride is prepared, and then reacts with alcohols in the presence of bases. The alkali can neutralize the hydrogen chloride generated by the reaction and promote the positive progress of the reaction. This reaction condition needs to be precisely controlled, and factors such as temperature, proportion of reactants, reaction time, etc. have a significant impact on the yield and purity of the product. This acid chloride method can also be used for the synthesis of fenvalerate. The cyanide-containing acid chloride is first prepared, and then reacted with a suitable alcohol to obtain the target product.
** 3. Phase Transfer Catalysis **
During the synthesis process, the introduction of a phase transfer catalyst can effectively increase the reaction rate and yield. For example, when some steps involve a two-phase reaction, the phase transfer catalyst can promote the rapid transfer of the reactants between the two phases. Taking a key step in the synthesis of fenvalerate as an example, in the reaction system between the organic phase and the aqueous phase, the phase transfer catalyst can smoothly enter the nucleophile in the aqueous phase into the organic phase and react with the substrate in the organic phase. Common phase transfer catalysts such as quaternary ammonium salts can effectively reduce the activation energy of the reaction, enable the reaction to proceed under milder conditions, and improve the selectivity and purity of the product. This method is also used in the synthesis of deltamethrin to help optimize the reaction process.

In the storage and transportation of 3-fenvalerate-2-methyl ether cyanogen, many key matters need to be paid attention to.
First, the storage place must be dry, cool and well ventilated. If the substance is in a humid, high temperature or poorly ventilated place, it may cause deterioration or chemical reactions due to environmental factors, which will affect its quality and stability. As "Tiangong Kaiwu" says, "Hide in dry places, avoid moisture and cool". This principle is the same. Only in a dry and cool environment can its quality be kept stable.
Second, keep away from fire and heat sources. 3-Fenvalerate-2-methyl ether cyanogen is flammable, and it is easy to cause combustion or even explosion accidents in case of open flames and hot topics. Just like the flammable things recorded in ancient books, they need to be kept away from the fire, "far from the fire to prevent accidents".
Third, when storing, they should be stored separately from oxidants, acids, alkalis, etc., and must not be mixed. Due to their chemical properties, violent chemical reactions may occur in contact with these substances, resulting in dangerous conditions. As the old saying goes, "everything has its own nature, and different types should not be mixed".
Fourth, during transportation, it is necessary to ensure that the container does not leak, collapse, fall, or damage. Packaging should comply with relevant standards, and protective measures should be taken, just like when transporting precious and fragile items in ancient times, it must be carefully wrapped and protected, "tightly packed, stable and comprehensive".
Fifth, transportation vehicles should be equipped with corresponding varieties and quantities of fire-fighting equipment and leakage emergency treatment equipment. In the event of an accident on the way, it can be responded to in time to reduce the harm. This is "pre-set for backup, and it will not be chaotic in case of danger".
Sixth, transportation personnel must understand the nature of the goods transported and the emergency treatment methods. For example, ancient traders must be familiar with the characteristics of the goods transported, "know the physical properties, and deal with them well" in order to ensure the safety of transportation.