3-[2-(3-Chlorophenyl)ethyl]pyridine-2-carbonitrile

3- [2- (3-cyanoethyl) ethyl] is a representation of organic compounds, and this structure-related substance has many applications in the field of chemistry. 2-Acetamide has a wide range of main uses and plays an important role in the traditional and modern chemical industry contexts depicted in "Tiangong Kaiwu".
In ancient times, although the chemical industry was not as developed as it is today, the application of related substances has begun to emerge. 2-Acetamide can be used as a basic raw material to participate in the preparation of some simple chemicals. For example, in the traditional dyeing and weaving industry, it can be used as an auxiliary preparation of dyes to help dyes adhere better to fabrics, improve dyeing effect, and make the color more vivid and lasting.
To the modern chemical industry, 2-acetamide has more diverse uses. In the field of medicine, it is often used as an intermediate in drug synthesis. The construction of many drug molecules requires the help of 2-acetamide to participate in the reaction and undergo specific chemical transformation to become pharmacologically active pharmaceutical components. In the field of materials science, it can be used to synthesize polymer materials with special properties. By polymerizing with other monomers, the material is endowed with unique properties such as good solubility and thermal stability to meet the needs of different engineering materials. At the same time, in the field of agricultural chemicals, or participate in the synthesis of pesticides, fungicides, etc., to play a role in ensuring crop growth and preventing pests and diseases. Overall, 2-acetamide provided important support for production and life in various forms in ancient and modern chemical-related industries.

To prepare 2-ethyl butyraldehyde, it can be prepared from 3- [2- (3-methoxy) propyl] valeraldehyde. The synthesis method is as follows:
First, the condensation reaction of hydroxyaldehyde can be used. Select a suitable aldehyde compound, and under the action of an alkaline catalyst, the two molecules of aldehyde interact. The α-hydrogen atom of one molecule aldehyde leaves under the action of a base to form a carbon negative ion, which undergoes nucleophilic addition to the carbonyl group of another molecule aldehyde to generate β-hydroxyaldehyde. This β-hydroxyaldehyde undergoes a dehydration reaction under heating conditions to form α, β-unsaturated alters. Subsequently, the α, β-unsaturated aldehyde is selectively hydrogenated, so that the carbon-carbon double bond is hydrogenated and reduced, while the carbonyl group is retained, so as to obtain the target product 2-ethylbutyraldehyde.
In addition, the Grignard reagent reaction can be considered. First prepare Grignard reagents containing suitable hydrocarbyl groups, such as ethylmagnesium bromide, etc. React them with the corresponding aldehyde or ketone, and the hydrocarbyl negative ions in the Grignard reagent carry out nucleophilic addition to the carbonyl group to generate magnesium alkoxides, which are hydrolyzed to obtain alcohol. If a suitable raw material is selected, through further oxidation reaction, the alcohol is oxidized to aldehyde, and 2-ethylbutyraldehyde can also be obtained. For example, 2-ethylbutanol is obtained by reacting Grignard reagents with suitable ketones, and then 2-ethylbutanol is oxidized to 2-ethylbutyraldehyde using mild oxidizing agents such as chromium trioxide-pyridine complexes.
Or, hydroformylation of alkenaldehyde is used. Using suitable olefins as raw materials, in the presence of catalysts, hydroformylation with carbon monoxide and hydrogen, and the introduction of aldehyde groups at the double bonds of olefins, 2-ethylbutyraldehyde can also be synthesized by rationally designing the structure of raw olefins. This reaction requires the selection of suitable catalysts, such as cobalt, rhodium and other metal complexes, to ensure the selectivity and efficiency of the reaction.

Let's take a look at this question and solve the part of the expression first. The first analysis is "3- [2- (3-cyanoethyl) acetyl]", in which the operation of chemical groups depends on the principles of chemical synthesis. However, the specific reaction conditions of each group are not known. Only from the structure point of view, if the reaction occurs, it may involve the process of group substitution and elimination. However, because the conditions are not available, it is difficult to determine the structure of the final product.
Let's talk about the physical properties of "2-methylbutane". 2-Methylbutane, also known as isopentane, is a colorless and transparent liquid. It is volatile and has a special odor. The boiling point is about 27.8 ° C, and the melting point is -159.4 ° C. The relative density is less than that of water, about 0.62. Insoluble in water, miscible with organic solvents such as ethanol and ether. It is flammable and can cause combustion and explosion when exposed to open flames and high heat energy in the air. Its vapor and air can form an explosive mixture, which can cause combustion and explosion when exposed to open flames and high heat energy. It can react strongly with oxidizing agents. Its vapor is heavier than air and can spread at a lower place to a considerable distance. In case of fire, it will catch fire and backfire. This is an important physical property of 2-methylbutane, which needs to be paid attention to in chemical applications, storage, transportation, etc., to avoid danger.

2-Methylbutane, also known as isopentane, is a colorless and transparent volatile liquid with a pleasant aromatic odor. In terms of chemical properties, it has the typical properties of alkanes.
First, a substitution reaction can occur. Because the hydrogen atom in the alkane molecule can be replaced by other atoms or atomic groups. For example, under light conditions, 2-methylbutane can undergo a substitution reaction with chlorine gas, and the chlorine atom gradually replaces the hydrogen atom in the molecule to form a mixture of different chlorine compounds. This reaction mechanism is that chlorine gas forms a chlorine radical under light. The chlorine radical attacks the 2-methylbutane molecule and captures the hydrogen atom, which then triggers a series of chain reactions.
Second, an oxidation reaction can be carried out. 2-Methylbutane can be completely burned in air, generating carbon dioxide and water, and releasing a large amount of thermal energy. The reaction equation is: $C_ {5} H_ {12} + 8O_ {2}\ stackrel {ignited }{=\!=\!=} 5CO_ {2} + 6H_ {2} O $. This property makes it suitable for use as a fuel.
Third, cracking reactions occur at high temperatures. 2-Methylbutane Under high temperature and no oxygen conditions, the carbon-carbon bond or carbon-hydrogen bond in the molecule will break, resulting in the formation of smaller molecular hydrocarbons. Such as the generation of ethylene, propylene and other small molecule olefins, these products are widely used in chemical production and can be used to synthesize plastics, rubber and many other organic compounds.

Looking at this question, it seems to be a probe into the prices of the commercial city. However, the "3 -% 5B2 - (3 - cyanophenyl) ethyl% 5D - 2 - formamide" mentioned, I have never heard of the trade in the ancient city. In today's world, science and technology are changing day by day, and all kinds of new materials and foreign materials are gushing out, or special products made by today's chemical industry, which are not common products in the ancient city.
The ancient city was easy, and most of them were mainly needed for clothing, food, housing and transportation, such as cloth, corn, firewood, utensils, etc. There was no trade in such complex chemical names at that time. If it is based on the common sense of the ancient market, there is no way to know its price.
In today's world, if you want to know the price range of "2-formamide" in the market, when you look at the chemical industry, ask the industry, merchants, or check the price list of chemical products. Because the price of chemical products often varies with supply and demand, the price of raw materials, and the age. And different qualities and specifications, the price is also different. Or due to the production of raw materials, the complexity of the process, the price varies.
However, since I am in the ancient times, it is difficult to determine the price range of "2-formamide" in today's city.