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What is the chemical structure of 1,1,1 - triacetoxy - 1,1 - dihydro - 1,2 - benziodoxol - 3 (1H) -one?
1%2C1%2C1+-+triacetoxy+-+1%2C1+-+dihydro+-+1%2C2+-+benziodoxol+-+3%281H%29-one, this is the name of an organic compound. According to the classical Chinese genre of "Tiangong Kaiwu", its chemical structure is roughly as follows:
This compound contains a benzene ring structure, and the benzene ring is a six-membered carbon ring, which has unique stability. The ring is connected with a heterocyclic structure of iodine and oxygen. This heterocyclic ring is composed of iodine, oxygen and carbon, of which the 1,2-benziodoxol part shows the specific connection of its ring system. At position 1, there are three acetoxy groups (triacetoxy) connected. The acetoxy group is the group left after the hydroxyl group is removed from the acetic acid. It is presented in the form of -O-C (= O) -CH, which gives the compound specific chemical activity and physical properties. And 1,1-dihydro (1,1-dihydro) indicates that there are two hydrogen atoms connected to the carbon at the first position, which also affects the electron cloud distribution and reactivity of the compound. And 3 (1H) -one indicates the presence of a carbonyl group (C = O) at the third position, and the hydrogen atom of the carbonyl group is in the 1H state. This carbonyl group brings many important chemical properties to the compound, such as nucleophilic addition. Overall, the chemical structure of this compound is complex and delicate, and the interaction of various parts determines its unique chemical behavior and properties.
What are the common applications of 1,1,1 - triacetoxy - 1,1 - dihydro - 1,2 - benziodoxol - 3 (1H) -one in organic synthesis?
1% 2C1% 2C1 - triacetoxy - 1% 2C1 - dihydro - 1% 2C2 - benziodoxol - 3 (1H) - one, the Chinese name is often 1,1,1-triacetoxy-1,1-dihydro-1,2-benzoiodoxacyclopentyl-3 (1H) -one, in organic synthesis, its common applications are as follows:
First, for oxidation reactions. This reagent is like a highly skilled "oxidation craftsman", capable of skillfully converting alcohols into corresponding carbonyl compounds. For example, in many organic synthesis pathways, it can precisely oxidize primary alcohols to aldose and secondary alcohols to ketones. This process is like a delicate "chemical magic", through its unique chemical properties, the conversion of alcohol functional groups is achieved, which lays the foundation for the subsequent construction of more complex organic molecular structures.
Second, this reagent also plays an important role in the construction of carbon-carbon double bonds. It is like an "engineer" who builds a bridge between chemical structures, able to participate in some specific reactions to promote the formation of carbon-carbon double bonds. In the grand "engineering" of organic synthesis, the construction of carbon-carbon double bonds is crucial, and it provides an effective means for this key link.
Third, participate in halogenation reactions. Like an "active participant" in the halogenation reaction, it can assist in the introduction of halogen atoms into organic molecules. The introduction of halogen atoms often significantly changes the physical and chemical properties of organic molecules, thus expanding the application range of organic compounds. Whether in the field of drug synthesis or materials science, the products of this halogenation reaction may exhibit unique properties and uses.
Fourth, it plays an indispensable role in the total synthesis of some complex natural products. The synthesis of complex natural products is like a beautifully carved work of art, requiring many delicate steps and suitable reagents. With its unique reactivity, 1,1,1-triacetoxy-1,1-dihydro-1,2-benzoiodoxacyclopentyl-3 (1H) -ketones can achieve specific transformations in the synthesis process, helping to complete the gorgeous "metamorphosis" from simple raw materials to complex natural products.
What are the preparation methods of 1,1,1 - triacetoxy - 1,1 - dihydro - 1,2 - benziodoxol - 3 (1H) -one?
1% 2C1% 2C1 - triacetoxy - 1% 2C1 - dihydro - 1% 2C2 - benziodoxol - 3% 281H% 29 - one, that is, 1,1,1-triacetoxy-1,1-dihydro-1,2-benzoiodoxyl-3 (1H) -one. The preparation method of this product is as follows:
To prepare 1,1,1-triacetoxy-1,1-dihydro-1,2-benzoiodoxyl-3 (1H) -one, iodobenzoic acid is often used as the starting material. First, the o-iodobenzoic acid is mixed with acetic anhydride and reacted at a suitable temperature. After mixing the two, the acetyl group of the acetic anhydride has good activity and can interact with the carboxyl group of the o-iodobenzoic acid.
In the reaction system, temperature control is crucial. Generally speaking, it needs to be heated to a moderate temperature, between about 80 and 120 ° C. During the heating process, the chemical bonds in the molecule are rearranged and transformed. The carboxyl group of o-iodobenzoic acid interacts with acetic anhydride to gradually form the key intermediate.
Then, the intermediate is further converted, and through a series of complex reactions, the final product is 1,1,1-triacetoxy-1,1-dihydro-1,2-benzoiodoxacyclopentyl-3 (1H) -one. After the reaction is completed, the product needs to be separated and purified. Methods such as recrystallization can be used to remove impurities such as unreacted raw materials and by-products in suitable solvents such as ethanol and ethyl acetate, etc., to obtain high-purity 1,1,1-triacetoxy-1,1-dihydro-1,2-benzoiodoxacyclopentyl-3 (1H) -one.
What are the physical and chemical properties of 1,1,1 - triacetoxy - 1,1 - dihydro - 1,2 - benziodoxol - 3 (1H) -one?
1%2C1%2C1+-+triacetoxy+-+1%2C1+-+dihydro+-+1%2C2+-+benziodoxol+-+3%281H%29-one, its Chinese translation is often 1,1,1-triacetoxy-1,1-dihydro-1,2-benzoiodoxacyclopentyl-3 (1H) -one. This substance is often referred to as BTI, which is a very important reagent in organic synthesis. The following are described in terms of physical and chemical properties.
Preface physical properties. This substance is usually in the state of white to light yellow crystalline powder and is quite stable at room temperature and pressure. Its melting point is about 122-126 ° C. With this specific melting point, it can be used as an important basis for identification and purification. And it has good solubility in common organic solvents, such as dichloromethane, chloroform, acetonitrile, etc. This property is convenient for uniform dispersion in organic reaction systems, and then efficient participation in the reaction.
Re-discussion of chemical properties. BTI is rich in triacetoxy groups, and this structure endows it with strong oxidizing properties. In many organic reactions, it can act as a mild oxidant to oxidize alcohols to corresponding aldodes or ketones. Taking the oxidation of primary alcohol as an example, it can generate aldodes with high selectivity, effectively avoiding the danger of excessive oxidation to carboxylic acids. Moreover, because the iodine atom in its structure is in a high valence state, it can be used as an electrophilic reagent in the electrophilic substitution reaction to react with substrates such as electron-rich aromatic hydrocarbons to achieve func In addition, BTI participates in relatively mild reaction conditions, has good tolerance to a variety of functional groups, and has obvious advantages in the synthesis of complex organic molecules. It can precisely construct carbon-heteroatom bonds, etc., which contributes to the development of organic synthesis chemistry.
1,1,1 - triacetoxy - 1,1 - dihydro - 1,2 - benziodoxol - 3 (1H) -one What are the precautions during use?
1% 2C1% 2C1 - triacetoxy - 1% 2C1 - dihydro - 1% 2C2 - benziodoxol - 3% 281H% 29 - one, is a reagent commonly used in organic synthesis. When using, pay attention to many matters.
First, this reagent has a certain chemical activity and is very particular about storage conditions. It should be placed in a dry, cool and well-ventilated place to avoid contact with moisture and heat sources. If stored improperly, it may cause the reagent to deteriorate and damage its reactivity.
For the second time, the experimental procedures should be strictly followed when taking and operating. Because it may be corrosive, appropriate protective equipment must be worn during operation, such as gloves, goggles, etc., to prevent contact with the skin and eyes. If inadvertent contact, rinse quickly with a large amount of water, and seek medical attention according to the severity of the injury.
Furthermore, the conditions of the reaction system are also crucial. Factors such as temperature, solvent, and the proportion of reactants can all have a significant impact on the reaction results. If the temperature is too high or too low, or the reaction rate is abnormal, the yield is poor or the side reaction increases. Therefore, it is necessary to precisely control the reaction conditions and determine the best parameters through pre-experiments and other means.
Repeat, and post-reaction treatment cannot be ignored. After the reaction is completed, when the product is separated and purified, an appropriate method should be selected according to the characteristics of the product and the nature of impurities to ensure the purity of the product. And the waste generated by the reaction should also be properly disposed of according to environmental protection requirements, and should not be discarded at will to avoid polluting the environment.
