What are the chemical properties of 1-iodo-2- (methylthio) benzene?
1 - iodo - 2 - (methylthio) benzene, the Chinese name is often iodine-anisole sulfide. This compound has general chemical properties, as mentioned by you.
In addition, the methylthio group of the iodine atom on the benzene is located in the same position. The iodine atom has special activity. Because the iodine atom is large and the C-I energy phase is not high, it is easy to replace the nucleus. For example, when encountering nuclear energy, the iodine atom is destroyed to form a new compound. This substitution can be used, either in the context of chemical properties or in the presence of specific catalysts.
Methylthio also affects its chemical properties. The sulfur atom in the methylthio group has solitary atoms, which makes it suitable for the reaction of the nucleus. At the same time, methylthio-benzene has a certain substitution effect. The density of the substitution on benzene is different, and the substitution activity and positional activity on benzene are different.
In addition, the benzene of 1-iodo-2 - (methylthio) benzene can be replaced normally. Due to the action of methylthio, the density of benzene substitutes increases, and its substitution activity increases when compared with benzene. In contrast, the substituents are more likely to enter the methylthio group and the methylthio group, which is the result of the joint action of methylthio substitution.
Furthermore, this compound may be used as a catalyst for gold catalysis. Under the action of gold catalysis, iodine atoms can combine carbon-containing nuclei and form carbon-carbon molecules. This is an important means for the synthesis of molecules.
What are the common synthesis methods of 1-iodo-2- (methylthio) benzene?
1-Iodo-2 - (methylthio) benzene is 1-iodo-2 - (methylthio) benzene. The common synthesis methods are as follows:
First, the nucleophilic substitution reaction is carried out with o-iodo-halobenzene and methyl mercaptan as raw materials. Take an appropriate amount of o-iodo-halobenzene and place it in a clean reaction vessel. Dissolve it in a suitable organic solvent such as N, N-dimethylformamide (DMF) to form a uniform solution. Then add the methylthiol salt slowly. This process needs to be carried out under low temperature and stirring conditions to ensure a smooth reaction. The negative ions of methyl mercaptan are nucleophilic and can attack the carbon atoms connected to iodine in o-iodohalobenzene. The iodine ions leave, and then form 1-iodo-2- (methylthio) benzene. The reaction conditions are mild and the yield is quite high, but methyl mercaptan needs to be properly prepared and stored because of its certain toxicity and odor.
Second, it is achieved through the coupling reaction catalyzed by transition metals. Using o-iodobenzene derivatives and methyl sulfide reagents as starting materials, an appropriate amount of transition metal catalysts such as palladium catalyst and ligands such as tri-tert-butyl phosphine are added. React in an organic solvent such as toluene under heating and inert gas protection. Transition metal catalysts can activate substrate molecules and promote the formation of carbon-sulfur bonds. After the reaction is completed, pure 1-iodine-2 - (methylthio) benzene can be obtained through separation, purification and other steps. This method has a wide range of applications and can be used for diverse modification of substrates, but the cost of catalysts is high and the post-treatment is relatively complicated.
Third, o-halothiophenol and iodomethane are used as raw materials. Dissolve o-halothiophenol in a suitable solvent, such as dichloromethane, and add a base such as potassium carbonate to neutralize the hydrogen halide generated by the reaction. Then iodomethane is added dropwise, and the reaction can occur at room temperature or under slightly heated conditions. Nucleophilic substitution of the methyl group of iodomethane by the sulfur anion of o-halothiophenol results in the formation of the target product 1-iodine-2 - (methylthio) benzene. The method is relatively easy to obtain raw materials and easy to operate, but attention should be paid to the toxicity and volatility of iodomethane.
What are the applications of 1-iodo-2- (methylthio) benzene in organic synthesis?
1-Iodo-2 - (methylthio) benzene, or 1-iodo-2 - (methylthio) benzene, is widely used in organic synthesis.
One of them can be used as an electrophilic reagent. Its iodine atom has good activity and can react with many nucleophiles under the catalysis of metal catalysts such as palladium and nickel. For example, Suzuki coupling reaction with organoboronic acid can be carried out under relatively mild reaction conditions, and carbon-carbon bonds can be formed to synthesize biphenyl compounds with diverse structures. In the field of materials science, such biphenyl compounds can be used as organic Light Emitting Diode (OLED) materials, because their unique molecular structure can affect the photoelectric properties of materials; in pharmaceutical chemistry, many biphenyl structural units are also contained in biphenyl molecules, which can be effectively synthesized by this reaction.
Second, the methylthio group of this compound can participate in a variety of conversion reactions. Methylthio groups have certain nucleophilic properties and can react with electrophilic reagents under appropriate conditions to achieve functional group conversion. For example, under some oxidation conditions, methylthio groups can be oxidized to sulfoxide or sulfone groups, thereby changing the polarity and reactivity of the molecule, providing more possibilities for subsequent synthesis steps. And methylthio can be used as a guide group to guide the reaction to occur at a specific position in the benzene ring, improving the regioselectivity of the reaction. In the metal-catalyzed aromatic ring carbon-hydrogen bond activation reaction, methylthio can coordinate with metals to activate the carbon-hydrogen bond at the ortho-position of the benzene ring, and then react with other reagents to synthesize benzene derivatives with specific substitution modes, which is of great significance in the total synthesis of natural products and the synthesis of new functional materials.
Third, 1-iodine-2 - (methylthio) benzene can also be used as a key raw material for the construction of heterocyclic compounds. In some multi-step reaction sequences, by rationally designing the reaction steps, the activity of iodine atom and methyl thio group can be used to promote the formation of sulfur-containing heterocyclic compounds. These heterocyclic compounds often show good bactericidal and insecticidal activities in the field of pesticides; in the field of medicine, some sulfur-containing heterocyclic structures are important pharmacoactive groups, which are of great significance for the development of new drugs.
What are the physical properties of 1-iodo-2- (methylthio) benzene?
1-Iodo-2- (methylthio) benzene, that is, 1-iodo-2- (methylthio) benzene, the physical properties of this substance are very critical, and it is of great significance for chemical research and practical applications.
Looking at its properties, under normal temperature and pressure, 1-iodo-2- (methylthio) benzene is often in a liquid state, and its appearance may have a certain color, mostly colorless to light yellow transparent liquid, but its color may also be slightly different due to the presence of impurities.
When it comes to density, 1-iodine-2 - (methylthio) benzene has a slightly higher density than water, so if it is mixed with water, the substance will sink to the bottom of the water. This property is very important in the process of separation and purification, and it can be separated from the aqueous phase by means of liquid separation.
In terms of boiling point, the boiling point of 1-iodine-2 - (methylthio) benzene is quite high, indicating that more energy needs to be input to convert it from liquid to gaseous state. A higher boiling point means that under normal ambient temperatures, this substance can maintain a stable liquid state and is not easy to volatilize. However, under high temperature or reduced pressure conditions, it can also achieve gas-liquid transformation.
Solubility is also one of the key properties. 1-Iodine-2 - (methylthio) benzene has good solubility in organic solvents, such as common ethanol, ethyl ether, dichloromethane and other organic solvents. This characteristic makes it possible to use suitable organic solvents as reaction media in organic synthesis reactions to promote the reaction. However, its solubility in water is extremely poor and almost insoluble. Due to the molecular structure of the compound, both benzene ring and methylthio groups are hydrophobic groups, making it difficult to form effective interactions with water molecules.
In addition, the volatility of 1-iodine-2- (methylthio) benzene is relatively low, and it is difficult to evaporate and dissipate rapidly in the air. This property makes it relatively easy to control its concentration and content during storage and use, and reduce the loss and environmental pollution caused by volatilization. At the same time, its odor may have a certain particularity. Although it does not have an extremely strong irritating odor, it may also have a unique chemical smell. During operation, attention should be paid to ventilation to prevent the odor from causing discomfort to the human body.
What are the storage conditions for 1-iodo-2- (methylthio) benzene?
1 - iodo - 2 - (methylthio) benzene is also a chemical substance. Its storage is essential, and it depends on its properties.
This compound is suitable for use in a good place where it is dry and dry. In a dry place, it can avoid the same kind of damage caused by high temperatures, prevent it from being changed due to its chemical properties, or generate decomposition, combustion and explosion, etc. In a dry place, it can prevent it from being hydrolyzed and isochemical in contact with water, so as to ensure its chemical properties. Through kindness, it can quickly disperse the harmful substances that may be damaged, so as not to gather and form disasters.
And the source of ignition and combustion, which are all causes of ignition, 1-iodo-2 - (methylthio) benzene. If it is connected, it may cause ignition and explosion. It is also likely to cause oxidation, acid and other substances to exist, and when they meet, it is easy to cause strong reactions and form a situation.
Containers containing this compound must be tightly sealed to prevent leakage. If there is leakage, it will not cause waste and materials, and it will pollute the environment and endanger the safety of surrounding organisms and people. Moreover, it is appropriate to deal with the material urgently when it exists, so as to deal with the accident quickly and cause less harm.