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What are the main uses of 4-bromo-2- (1,1,1-trifluoro-2-methylpropane-2-yl) pyridine?
4-Bromo-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) pyridine, this compound has important uses in many fields.
In the field of medicinal chemistry, it is often used as a key intermediate. Because of its unique chemical structure, it contains bromine atoms and fluoroalkyl groups, giving it special physicochemical properties and biological activities. With the help of its bromine atom activity, it can be combined with other groups with specific biological activities through nucleophilic substitution and other reactions to synthesize drug molecules with specific pharmacological activities. For example, when developing antibacterial drugs, this compound can be used to build a key drug skeleton, and through subsequent modifications, the drug's ability to inhibit or kill specific bacteria can be enhanced.
In the field of materials science, 4-bromo-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) pyridine also plays an important role. Fluorine-containing groups can significantly improve some properties of materials, such as thermal stability, chemical stability and weather resistance. Using them as raw materials and through polymerization and other reactions, polymer materials with excellent performance can be prepared. In aerospace, electronic devices and other fields that require strict material properties, it is used to make high temperature and corrosion resistant parts or coating materials.
In organic synthetic chemistry, this compound is an extremely useful synthetic building block. Its bromine atoms are prone to various chemical reactions, such as Suzuki coupling, Negishi coupling, etc., which enable the efficient construction of carbon-carbon bonds and carbon-heteroatom bonds to synthesize complex and diverse organic compounds, providing a powerful tool for organic synthesis chemists to expand their compound libraries and explore new synthesis paths.
What are the synthesis methods of 4-bromo-2- (1,1,1-trifluoro-2-methylpropane-2-yl) pyridine?
To prepare 4-% ether-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) phenol, there are many synthesis methods, and several are as follows.
First, it can be replaced by nucleophilic substitution. First, take an appropriate phenolic compound and make it react with halogenated hydrocarbons containing 1,1,1-trifluoro-2-methylbutyl-2-yl in an alkaline environment. Alkalis, such as potassium carbonate and sodium hydroxide, can promote the deprotonation of phenolic hydroxyl groups, enhance their nucleophilicity, and then replace them with halogenated hydrocarbons to obtain the target product. In this process, the choice of halogenated hydrocarbons is quite critical, and the halogen atom activity needs to be moderate to ensure the smooth progress of the reaction and reduce side reactions.
Second, the etherification reaction strategy can be adopted. Using alcohols and phenols containing corresponding substituents as raw materials, under the catalysis of strong acids, such as concentrated sulfuric acid or p-toluenesulfonic acid, dehydration is achieved to form ethers. During the reaction, attention should be paid to the control of temperature. If the temperature is too high, it is easy to cause alcohol dehydration to form by-products such as olefins, and if the temperature is too low, the reaction rate will be slow. At the same time, it is necessary to ensure that the reaction system is anhydrous, so as not to affect the reaction equilibrium and rate.
Third, the coupling reaction catalyzed by transition metals is also feasible. Using transition metal catalysts such as palladium and copper, phenolic derivatives are coupled with suitable organohalides or olefin derivatives. Such methods have relatively mild conditions and good selectivity, However, transition metal catalysts are expensive, and post-reaction treatment may need to consider the recovery and separation of catalysts to reduce costs.
Synthesis of 4-% ether-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) phenol has advantages and disadvantages. In actual operation, when considering factors such as the availability of raw materials, cost, difficulty of reaction conditions and purity requirements of target products, the optimal method is selected.
What are the physicochemical properties of 4-bromo-2- (1,1,1-trifluoro-2-methylpropane-2-yl) pyridine?
4-Bromo-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) pyridine has unique physical and chemical properties.
In terms of physical properties, its properties are either solid or liquid, depending on the surrounding environmental conditions. Usually, its melting point is affected by the intermolecular force. The molecule contains bromine atoms, and the bromine atom has a large atomic weight and van der Waals force, which enhances the intermolecular force, so the melting boiling point may be relatively high. And because of its fluorine atom, the fluorine atom is extremely electronegative, which can change the polarity of the molecule and have a great impact on its solubility. This compound may be slightly soluble in water, but it has good solubility in organic solvents such as ethanol and dichloromethane, and its molecular structure has good compatibility with organic solvents.
In terms of its chemical properties, bromine atoms are active check points. Bromine atoms are slightly more electronegative than carbon, and the carbon-bromine bond has a certain polarity, which is easy to be attacked by nucleophiles and cause nucleophilic substitution reactions. For example, when encountering nucleophiles such as hydroxyl anions, bromine atoms may be replaced by hydroxyl groups to form corresponding alcohol derivatives. The pyridine ring is also chemically active. Pyridine nitrogen atoms have lone pairs of electrons, which are alkaline and can react with acids to form salts. The pyridine ring can undergo electrophilic substitution reaction, but due to the electron-withdrawing effect of nitrogen atoms, the reaction check point is slightly different from the electrophilic substitution of benzene ring, which mostly occurs at the β position of the pyridine ring. In addition, trifluoromethyl is a strong electron-withdrawing group, which can reduce the electron cloud density of the pyridine ring, increase the difficulty of the electrophilic substitution reaction on the ring, but make the carbon atoms on the ring more susceptible to attack by nucleophiles, and at the same time affect the acidity of the molecule, so that the acidity of the compound is enhanced.
What is the price range for 4-bromo-2- (1,1,1-trifluoro-2-methylpropane-2-yl) pyridine in the market?
Today there are 4-hydroxy-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) pyridine, want to know its price range in the market. This is a specific compound in the field of fine chemicals, and its price is affected by multiple factors.
First talk about the preparation process. The synthesis of this compound may require multiple steps, and some steps require strict reaction conditions, such as specific temperature, pressure and catalyst. If the preparation process is complicated, special reagents or complex equipment are involved, the cost will be high, which will then push up the market price.
Let's talk about market supply and demand. If this compound is widely used in the fields of medicine, pesticides or materials science, the demand is strong, and the supply is limited, the price will rise; on the contrary, if the demand is low, or there is a large inventory backlog, the price may decline.
And the effect of purity. High-purity 4-hydroxyl-2 - (1,1,1-trifluoro-2-methyl-butyl-2-yl) pyridine is often used in high-end scientific research and pharmaceuticals, and its preparation is difficult, so the price is much higher than that of low-purity products.
Overall consideration, this compound fluctuates greatly in the market price range. General industrial grade, with a purity of about 90%, the price per kilogram may be 500 to 1,500 yuan; while high purity, with a purity of 98% or more, the price per kilogram may exceed 3,000 yuan, and even due to special uses and extremely high purity requirements, the price can reach tens of thousands of yuan per kilogram.
What are the storage conditions for 4-bromo-2- (1,1,1-trifluoro-2-methylpropane-2-yl) pyridine?
The storage of 4-ether-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) pyridine depends on its chemical properties and phase characteristics. This fluorine-containing compound has chemical activity, and most of them have certain chemical activity.
First of all, it is recommended to store it in the atmosphere. Due to the high degree of oxidation, or the increase of its chemical activity, it will cause undesirable reactions such as decomposition and polymerization. The presence of fluorine atoms in this compound makes the chemical properties stable, but the high temperature can still break it.
Second, it is necessary to maintain the dry environment. The presence of water, or the reaction of hydrolysis, especially the presence of ether in the molecule, in the environment of acidic or mild water, or cause ether cracking, affecting its integrity.
In addition, avoid the bonding of chemical reactive substances such as oxidation and prototyping. Fluorine-containing substances or oxidation reactions, so that the oxidation of fluorine atoms can be changed, and the molecules can be broken.
In addition, the storage container also needs to be investigated. It is appropriate to use materials with certain chemical properties, such as glass or specific plastic materials, to avoid the biochemical reactions of the compounds in the container and stain the product. And the container should be well-packed to prevent the compound from escaping, and to avoid the entry of external water vapor and water.
Therefore, proper storage of 4-ether-2- (1,1,1-trifluoro-2-methylbutyl-2-yl) pyridine requires consideration of multiple factors in order to maintain its chemical properties and ensure the availability of its products.