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What is the main use of 4- (Difluoromethoxy) Iodobenzene?
4- (difluoromethoxy) iodobenzene is also an organic compound. It has a wide range of uses and plays an important role in the field of organic synthesis.
One of them is often a key building block for the construction of complex organic molecules. Due to the unique activity of iodine atoms and difluoromethoxy groups on the benzene ring, chemists can connect it with other organic fragments through many organic reactions, such as coupling reactions, to create compounds with diverse structures. This is of great significance in the field of medicinal chemistry. Drug developers often rely on such reactions to build molecular structures with specific biological activities, hoping to find new drugs with excellent efficacy.
Second, in the field of materials science, 4- (difluoromethoxy) iodobenzene is also useful. The polymer materials involved in the synthesis, or due to the introduction of difluoromethoxy, exhibit unique physical and chemical properties, such as better thermal stability, electrical properties, etc. These materials may be applied to electronic devices, optical materials, and many other aspects, contributing to the development of materials science.
Third, in the field of pesticide chemistry, compounds made from this raw material may have good biological activity and can be used to kill pests, weed control and other agricultural activities, helping to increase agricultural yield.
In conclusion, 4- (difluoromethoxy) iodobenzene, with its unique chemical structure, plays an important role in many fields such as organic synthesis, drugs, materials, and pesticides, and promotes the progress and development of various sciences and technologies.
What are the physical properties of 4- (Difluoromethoxy) Iodobenzene?
4- (difluoromethoxy) iodobenzene is one of the organic compounds. Its physical properties are unique and are described in detail as follows:
Looking at its appearance, under room temperature and pressure, it is often a colorless to light yellow transparent liquid, clear and free of impurities, with a warm luster, which can be regarded as a unique characterization in the field of organic chemistry.
Smell its smell, it has a special aromatic smell. However, this fragrance is not pleasant, but has the unique irritation of organic compounds. Although it is not strong, it can still be perceptible. When operating, this smell can be an important clue for identification.
In terms of its melting point, it is about -20 ° C. This low temperature melting point allows it to maintain a liquid state at a relatively low temperature, reflecting the characteristics of intermolecular forces. The arrangement of the structure makes the intermolecular binding weaker, and it is not easy to condense into a solid state at low temperature.
As for the boiling point, it is roughly in the range of 190-195 ° C. The higher boiling point indicates that more energy is required to overcome the intermolecular attractive force and transform it from a liquid state to a gaseous state. This property is closely related to the relative molecular mass of the molecule, the type and strength of the intermolecular forces.
In terms of solubility, 4- (difluoromethoxy) iodobenzene is insoluble in water. This is because water is a polar solvent, and the molecular structure of this compound is weak in polarity. According to the principle of "similar miscibility", the two are difficult to dissolve each other. However, it is soluble in many organic solvents, such as ether, dichloromethane, toluene, etc. In organic synthesis reactions, this solubility facilitates the choice of reaction medium, allowing the reactants to be fully mixed and promoting the smooth progress of the reaction.
The density is about 1.8-1.9 g/cm ³. Compared with the density of water, its density is higher, so when mixed with water, it will sink to the bottom. This density characteristic is of great significance in separation, purification and other operation steps. The physical properties of 4- (difluoromethoxy) iodobenzene are crucial in the fields of organic synthesis, drug development, etc. Chemists can rationally design reaction conditions and optimize separation and purification processes based on these properties to achieve the desired chemical goals.
Is 4- (Difluoromethoxy) Iodobenzene Chemically Stable?
4- (difluoromethoxy) iodobenzene is one of the organic compounds. The stability of its chemical properties depends on many factors.
In this compound, the iodine atom has high reactivity. Due to the relatively low bond energy of the carbon-iodine bond, it is easy to occur heterocracking, causing the iodine atom to leave, leading to nucleophilic substitution. In case of nucleophilic reagents, the iodine atom can be replaced, causing the molecular structure to change, which reflects the limitation of its stability to a certain extent.
In addition, the fluorine atom in the difluoromethoxy part has strong electronegativity. This property reduces the electron cloud density of the carbon atom connected to it, affects the overall electron distribution of the molecule, or has an effect on its chemical stability. Although fluorine atoms can stabilize the distribution of electron clouds in some molecular areas by inducing effects, they may also enhance the reactivity of the atoms connected to them.
From the perspective of spatial structure, the presence of substituents may cause changes in molecular steric resistance. In 4- (difluoromethoxy) iodobenzene, the positions of difluoromethoxy and iodine atoms on the benzene ring may affect the difficulty of reagents approaching the reaction check point during intermolecular interactions and chemical reactions. If the steric resistance is too large, some reactions may be inhibited, which can maintain molecular stability to a certain extent; conversely, if the steric resistance is not enough to prevent the reagent from approaching the activity check point, the stability will be reduced.
Under common conditions, 4- (difluoromethoxy) iodobenzene is not extremely unstable, but in specific chemical reaction scenarios, due to the characteristics of iodine atoms and difluoromethoxy groups, it can participate in a variety of reactions, so its stability is not absolute, and it is actually affected by various factors such as reaction conditions and contact reagents.
What are the synthesis methods of 4- (Difluoromethoxy) Iodobenzene
To prepare 4- (difluoromethoxy) iodobenzene, there are many methods, and the number of them is now.
First, it can be obtained by the reaction of 4-hydroxy iodobenzene and difluoromethyl halide under the catalysis of alkali. Among them, 4-hydroxy iodobenzene is the starting material, and its phenolic hydroxyl group is nucleophilic. Alkali, such as potassium carbonate and sodium hydroxide, can capture the hydrogen of the phenolic hydroxyl group, causing it to form phenoxy negative ions, which are more nucleophilic. Difluoromethyl halides, such as difluoromethyl chloride or difluoromethyl bromide, have active halogen atoms and are easily attacked by phenoxy negative ions. After nucleophilic substitution, they form 4- (difluoromethoxy) iodoben When reacting, it is necessary to pay attention to the reaction temperature, the amount of alkali and the proportion of reactants. Too high or too low temperature can affect the reaction rate and yield, and improper alkali content can also cause side reactions.
Second, start with 4-iodobenzoic acid, first convert it into the corresponding acid chloride, and then react with difluoromethanol under appropriate conditions, and then reduce and decarboxylate, and the target product can also be obtained. 4-iodobenzoic acid is treated with chlorination reagents, such as thionyl chloride or oxalyl chloride, and becomes 4-iodobenzoyl chloride, which has high activity. Difluoromethanol is reacted with it to form an ester, and the subsequent reduction and decarboxylation step can be followed by a suitable reducing agent, such as lithium aluminum hydride, etc., through a series of reactions to obtain 4- (difluoromethoxy) iodobenzene. This path step is slightly complicated, but the reaction conditions are relatively mild. If the operation is proper, satisfactory yields can also be obtained.
Third, palladium-catalyzed cross-coupling reaction. 4-halogenated anisole derivatives (halogen atoms are iodine, bromine, etc.) are reacted with difluoromethylborate or difluoromethyltin reagents in the presence of palladium catalysts and ligands. Palladium catalysts such as tetra (triphenylphosphine) palladium and ligands such as tri-tert-butylphosphine can promote This reaction has high selectivity and controllable conditions. It is quite effective for the preparation of 4- (difluoromethoxy) iodobenzene with complex structure, but the palladium catalyst is expensive and costly.
All synthesis methods have their own advantages and disadvantages. In practical application, when considering factors such as raw material availability, cost, yield and product purity, the optimal method is selected.
What is the price range of 4- (Difluoromethoxy) Iodobenzene in the market?
4 - (difluoromethoxy) iodobenzene, the price range of this product in the market is difficult to determine. The price of the cover often changes for many reasons, and it is difficult to generalize.
First, the price of raw materials is the key factor. If the price of the raw materials required for the synthesis of this compound fluctuates sharply, the price of 4 - (difluoromethoxy) iodobenzene will also be affected. If the raw materials are scarce and the demand exceeds the supply, the price will rise; conversely, if the raw materials are abundant and the supply exceeds the demand, the price may decline.
Second, the complexity of the preparation process is closely related to the cost. If the preparation method is complicated and requires multiple processes, high-end equipment and professional and technical personnel, the production cost will be high, and the market price will also rise; if the process is simple, the cost can be controlled, and the price may be relatively close to the people.
Third, the amount of market demand also affects the price. If the market demand for this product is strong at a certain time, but the supply is limited, the merchant may raise the price due to the situation; if the demand is low, it will be sold for promotion, and the price may be reduced.
Fourth, the price varies depending on the manufacturer, due to their own cost control and production scale. Large factories have low costs and competitive prices due to scale effects; small factories may have higher prices due to high costs.
Generally speaking, in the chemical raw material market, the price per gram may range from tens to hundreds of yuan, but this is only an approximate number. The actual price depends on the specific time, market conditions and merchants. When purchasing, be sure to consult different merchants to check the quality and price in detail before you can get the right price.