2,6-difluoro-3-iodopyridine

2% 2C6-diene-3-heptyne is involved in the domain of "Tiangongkai", which is mostly related to chemical materials and organic synthesis.
Looking at "Tiangongkai", it contains many processes in detail. Although the chemical theory at that time was not as complete as it is today, it has insight into the properties and uses of various substances. 2% 2C6-diene-3-heptyne, or has its use in the preparation of special materials. For example, "Tiangongkai" records that many materials are used in dyeing, lacquer making and other processes. This alkylene substance may add a new way for the synthesis of dyes and paints. Its unique chemical structure can be converted into compounds with specific colors or properties by special means, which can be used for fabric dyeing to make the color more vivid and lasting; or used in paint making to enhance the toughness, luster and durability of the paint.
Furthermore, in the ancient metallurgical auxiliary link, 2% 2C6-diene-3-heptyne may play a role. "Tiangong Kaiwu" has developed metallurgy, and special additives may be required for metal purification, casting and molding. This substance may help remove metal impurities due to its chemical activity, or improve metal fluidity during casting, making castings more delicate and improving yield.
And "Tiangong Kaiwu" has detailed processing and utilization of various natural products. 2% 2C6-diene-3-heptyne may be involved in the deep processing of natural products. Such as the refining and modification of vegetable oils, fragrances, etc., with its special structure and reactivity, participate in chemical reactions, optimize product quality, change aroma, solubility and other characteristics to meet different consumption.
Although "Tiangong Kaiwu" does not directly describe 2% 2C6-diene-3-heptyne, it is deduced from its idea of expanding the application of substances. This substance may have played a unique role in many fields such as ancient chemical industry, metallurgy, and natural product processing, which was ingeniously conceived and tried, adding luster to the development of the process at that time.

2% 2C6-diethyl-3-nitropyridine. The synthesis method is as follows:
To obtain 2,6-diethyl-3-nitropyridine, you can do it by numerical methods. First, pyridine is used as a group and prepared by alkylation and nitration. First, pyridine and halogenated ethane are alkylated in the presence of a suitable base and catalyst to obtain 2,6-diethylpyridine. This step requires attention to the control of reaction conditions, such as temperature, amount of base and the ratio of halogenated ethane, so that alkylation mainly occurs at the 2,6 position. Commonly used bases include potassium carbonate, potassium tert-butanol, etc. The catalyst can be selected from copper salt or palladium salt.
Then, the resulting 2,6-diethylpyridine is nitrified as a mixed acid (mixture of sulfuric acid and nitric acid). The ratio of mixed acids, reaction temperature and time all have a significant impact on the nitrification location and yield. Generally speaking, the reaction at low temperature is more conducive to the selective introduction of nitro groups into the 3-position.
Second, suitable nitrogen-containing heterocyclic precursors can be used. For example, a nitrogen-containing five-membered heterocycle and suitable halogenated hydrocarbons and nitrifying reagents can be used to construct a pyridine ring through multi-step reactions and introduce ethyl and nitro groups. This path requires careful planning of each reaction step to ensure that each step is efficient and selective.
Furthermore, a metal-catalyzed cross-coupling reaction strategy can also be considered. First, pyridine halide or borate containing specific substituents are prepared, and then ethyl and nitro are introduced through palladium-catalyzed cross-coupling reactions, respectively. However, this method requires quite high reaction conditions and reagent purity.
In short, to synthesize 2,6-diethyl-3-nitropyridine, it is necessary to weigh the advantages and disadvantages of each method according to the actual situation, and choose the most suitable synthesis path to achieve the purpose of efficient and high selectivity preparation.

2% 2C6-diene-3-heptyne is one of the organic compounds. Its physical properties are unique.
When it comes to appearance, under room temperature and pressure, it is mostly in the form of a colorless to slightly yellow liquid, with a clear and transparent texture. It looks like a clear spring. Its smell often has a special aroma, but it is not a rich fragrance, but a unique hydrocarbon smell, slightly irritating, just like a subtle medicinal fragrance mixed with a fresh gas. When you smell it, it has a unique flavor.
When it comes to boiling point, because its molecular structure contains multiple unsaturated bonds, its boiling point is slightly lower than that of saturated hydrocarbons with the same number of carbon atoms. Generally speaking, it is within a certain temperature range. This temperature allows it to gradually transform from liquid to gaseous state under normal pressure, just like the melting of ice, quietly changing. Its melting point is relatively low, and it condenses into a solid state in a low temperature environment. It is like a quiet ice crystal in a cold night, condensing in the world.
In terms of density, it is lighter than water, just like a light feather floating on the water surface, throwing it into water, and it will float on the upper layer. It is distinct from water and does not blend with each other. This compound has good solubility in organic solvents, such as ethanol, ether and other organic solvents. It can be fused with it, just like friends gathering together, regardless of each other, to form a uniform solution. Due to its good solubility, it is often used in the field of organic synthesis as a reaction solvent or intermediate, contributing to the great cause of organic synthesis and making extraordinary contributions.

2% 2C6-diethyl-3-cyanopyridine, this substance has a variety of chemical properties. It is weakly basic, because the nitrogen atom of the pyridine ring has lone pairs of electrons, it can accept protons, and can form salts in acidic environments. For example, when reacted with hydrochloric acid, the corresponding pyridine hydrochloride will be formed.
It has nucleophilic substitution activity, and the cyano group is a strong electron-absorbing group, which causes the electron cloud density of the pyridine ring to decrease, and the 2,4,6 positions are vulnerable to attack by nucleophilic reagents. Like under basic conditions, hydroxyl negative ions can attack the pyridine ring to form new compounds containing hydroxyl groups.
Cyanyl is chemically active and can undergo a variety of reactions. It can be hydrolyzed, and under the catalysis of acid or base, the cyanyl group is gradually changed to the carboxyl group to obtain 2% 2C6-diethyl-3-pyridinecarboxylic acid. It can also be reduced, and the cyanyl group is converted into an amino group with a strong reducing agent such as lithium aluminum hydride to obtain 2% 2C6-diethyl-3-pyridinetylamine.
In addition, the hydrocarbon group of 2% 2C6-diethyl-3-cyanopyridine has a certain reactivity. Due to the influence of the pyridine ring and cyanyl group on the ethyl group, α-hydrogen has a certain acidity and can leave under the action of a strong base, which in turn triggers subsequent reactions, such as the substitution reaction with halogenated hydrocarbons to increase the carbon chain.

The price of 2,6-diene-3-cyano is now in the market. What is the price?
The price of goods in Guanfu City often varies due to various reasons. This 2,6-diene-3-cyano is used in various industries or involved in research and development. The determination of its price is primarily related to the difficulty of making it. If the method of making it is complicated, it requires all kinds of tricks and expensive tools, and it takes a long time, it will cost a lot of money, and its price will be high.
Furthermore, it depends on the amount needed. If there is a lot of competition in the city, the demand is wide and the supply is narrow, the price will be raised; if there are few applicants, the supply will exceed the demand, and the price will be depressed.
Also, the origin is far and near, and the transportation fee is also involved. If the origin is far away, the transportation cost will be heavy, and the price will increase; if the transportation cost is low, the price will decrease.
And in the chemical industry, the government's regulations and changes in the situation can affect its price. Or due to the change of regulations, the cost of the system will be higher; or due to the turbulence of the times, the supply and demand will shift.
However, I have not personally involved in the trade of the city, and it is difficult to know the current price of this 2,6-diene-3-cyano group. If you want to know the details, you can ask the master of the chemical industry, the owner of the business, or refer to the market list of the cities to get its approximate price.