2 3 Dibromo 5 Benzoylpyrrole
pyridine pyrrole pyrazine piperidine piperazine

2,3-Dibromo-5-benzoylpyrrole

    Specifications

    HS Code

    257956

    Chemical Formula C11H7Br2NO
    Molecular Weight 331.08
    Appearance Solid (usually off - white to light - colored powder)
    Melting Point Typically in a certain temperature range (needs experimental determination)
    Solubility In Water Low solubility in water
    Solubility In Organic Solvents Soluble in some organic solvents like dichloromethane, chloroform
    Density Requires experimental measurement
    Stability Should be stored in a cool, dry place away from light and oxidizing agents
    Uv Vis Absorption Absorbs in certain UV - Vis wavelength regions characteristic of its conjugated system

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    Frequently Asked Questions

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    What are the main uses of 2,3-dibromo-5-benzoyl pyrrole?
    2% 2C3-dibromo-5-fluorobenzylpyridine, this is an organic compound. Its main uses are quite extensive. In the field of medicinal chemistry, it is often used as a key intermediate to synthesize drug molecules with specific biological activities. For example, when developing antibacterial and antiviral drugs, it can participate in the construction of drug molecules by virtue of its unique chemical structure, giving drugs better pharmacological properties.
    In the field of materials science, it also has important uses. Or it can be introduced into the structure of polymer materials through specific chemical reactions to improve the electrical and optical properties of materials. For example, in the preparation of organic optoelectronic materials, with the help of its special structure, the absorption and emission efficiency of the material to light can be optimized, and the application performance of the material in optoelectronic devices can be improved.
    In the field of agricultural chemistry, it can be used as a raw material to prepare new pesticides. With its chemical activity, pesticide products that have high-efficiency control effects on specific diseases and insect pests are designed and synthesized, and compared with traditional pesticides, they may have lower toxicity and better environmental compatibility, which is conducive to the sustainable development of agriculture.
    "Tiangong Kaiwu" Although there is no direct record of 2% 2C3-dibromo-5-fluorobenzylpyridine, with ancient wisdom, the use and development of such compounds also follow the concept of using material characteristics to serve all aspects of human life. Through in-depth study of its structure and properties, it can be applied in many fields and benefit people's livelihood.
    What are the physical properties of 2,3-dibromo-5-benzoyl pyrrole?
    2% 2C3-dibromo-5-fluorobenzylpyridine is a unique organic compound with the following physical properties:
    Looking at its appearance, under room temperature and pressure, or as a solid state, it often appears white to light yellow crystalline powder. This color state may vary depending on the amount and class of impurities contained. The powder is fine in texture and has a faint luster under light, just like a faint light hidden in the dust.
    When it comes to melting point, due to intermolecular forces, it is about a certain temperature range. This temperature is the critical temperature for it to change from solid to liquid state. When the ambient temperature gradually rises to the melting point, the thermal motion of the molecules intensifies, and the lattice structure begins to disintegrate, and then gradually melts into a liquid state.
    In terms of boiling point, under a specific pressure, it needs to reach a higher temperature to boil. When boiling, the molecule is able to escape from the liquid phase and turn into the gas phase. However, its exact boiling point is affected by many factors such as the attractive force between molecules and the relative molecular weight.
    Solubility is also an important physical property. In organic solvents, such as common ethanol, dichloromethane, acetone, etc., it may have certain solubility. Due to the principle of similar miscibility, the molecular structure of the compound and the molecules of the organic solvent can form interactions such as hydrogen bonds and van der Waals forces, which make it soluble in such solvents. In water, due to its poor polarity matching with the polarity of the water molecule, the solubility may be minimal.
    Density is also a parameter that characterizes its physical properties, reflecting the mass of a substance per unit volume. Although its exact density needs to be determined by precise experiments, it can be inferred from its molecular composition and structure, or it is in a similar range to the density of compounds with similar structures.
    In addition, the compound may have a certain odor, but the odor may be different due to the difference between the concentration and the individual's sense of smell. And its stability to light and heat is also a key property. Photothermal or intramolecular chemical bond vibration intensifies, triggering reactions such as decomposition and isomerization, which affect its chemical purity and stability. Therefore, during storage and use, it is often required to be protected from light, cool, and temperature-controlled to maintain the stability of its physical and chemical properties.
    What are the chemical properties of 2,3-dibromo-5-benzoyl pyrrole?
    2% 2C3-dibromo-5-fluorobenzylpyridine is an organic compound. Its chemical properties are quite complex, with the following numbers:
    First, the reactivity of the halogen atom. The molecule contains two halogen atoms, bromine and fluorine, which have high activity and are easy to participate in nucleophilic substitution reactions. Under suitable conditions, bromine atomic energy is replaced by nucleophiles such as hydroxyl and amino groups, and many new compounds are derived. For example, when co-heated with sodium hydroxide aqueous solution, the bromine atom can be replaced by hydroxyl groups to obtain products containing hydroxyl groups. This reaction provides an important path for the preparation of compounds containing specific functional groups.
    Second, the properties of pyridine rings. Pyridine rings have certain aromatic and basic properties. Due to the presence of nitrogen atoms, the pyridine ring can bind to protons, exhibit alkalinity, and can form salts with acids. And the pyridine ring can participate in the electrophilic substitution reaction, but due to the electron-withdrawing action of the nitrogen atom, the reactivity is slightly lower than that of the benzene ring. The electrophilic substitution reaction often occurs at the β position of the pyridine ring.
    Third, the characteristics of the benzyl structure. The carbon-halogen bond on the benzyl group is affected by the conjugation effect of the benzene ring, and the activity is also higher. In some reactions, the benzyl halogen can undergo elimination reaction or further substitution reaction. For example, when encountering strong bases, the bromine atom on the benzyl group can undergo elimination reaction to form a carbon-carbon double bond.
    Fourth, the influence of fluor Fluorine atoms are highly electronegative, and can significantly change the physical and chemical properties of compounds when introduced into molecules. It can enhance the stability of molecules, affect the polarity and fat solubility of molecules, and play an important role in the biological activity and solubility of compounds. In the field of medicinal chemistry, fluorinated compounds often have unique physiological activities and pharmacokinetic properties.
    In summary, 2% 2C3-dibromo-5-fluorobenzylpyridine exhibits rich and diverse chemical properties due to the interaction of various functional groups, and has potential application value in organic synthesis, drug development and other fields.
    What are the synthesis methods of 2,3-dibromo-5-benzoyl pyrrole?
    To prepare 2,3-dibromo-5-fluorobenzylpyridine, there are many methods, and the following are common synthesis methods.
    First, 5-fluorobenzylpyridine can be used to start bromination reaction with bromine under suitable reaction conditions. This process requires the selection of suitable solvents, such as dichloromethane, carbon tetrachloride and other inert organic solvents, to ensure the smooth progress of the reaction. At the same time, in order to make the reaction occur efficiently, it is often necessary to add initiators, such as benzoyl peroxide and the like. Under certain temperature and light conditions, bromine selectively reacts with the hydrogen atom at the benzyl position in the 5-fluorobenzyl pyridine molecule to gradually generate 2,3-dibromo-5-fluorobenzyl pyridine. However, this method requires fine control of the reaction conditions, because the selectivity and degree of reaction of bromination reaction are not easy to control. If you don't pay attention, you may cause the formation of polybrominated products, which affects the purity and yield of the target product.
    Second, it can be achieved by the strategy of constructing pyridine rings. First, a suitable fluorine-containing and benzyl-containing raw materials are used to synthesize pyridine rings with pyridine ring reagents through a series of condensation and cyclization reactions to construct pyridine rings. This step may involve multi-step reactions, such as nucleophilic substitution, cyclization addition, etc. After the construction of the pyridine ring is completed, it is then brominated. Although this route is slightly complicated, it can precisely regulate the position and type of substituents during the construction of the pyridine ring, which is conducive to improving the selectivity and purity of the target product. However, this route requires high reaction conditions and operation skills, and the intermediates of each step of the reaction need to be properly separated and purified to obtain a higher yield of the target product.
    Third, the coupling reaction catalyzed by transition metals can also be used. Using fluorine-containing and benzyl-containing halogenates or borate esters as raw materials, under the catalysis of transition metal catalysts, such as palladium, nickel and other complexes, the coupling reaction with pyridine derivatives occurs to directly construct the carbon-carbon bond and carbon-nitrogen bond of the target product. This method has the advantages of mild reaction conditions and high selectivity, and the regioselectivity and stereoselectivity of the reaction can be regulated by selecting suitable ligands and reaction conditions. However, transition metal catalysts are usually expensive and the reaction cost is high, and the recovery and reuse of catalysts are also issues that need to be considered.
    What are the precautions for using 2,3-dibromo-5-benzoyl pyrrole?
    2% 2C3-dibromo-5-fluorobenzylpyridine requires attention to many matters during use.
    First, because of its certain chemical activity, when storing, it must be placed in a cool, dry and well-ventilated place, away from fire and heat sources, to prevent danger. And it should be stored separately from oxidants, acids, etc., to avoid mutual reaction.
    Second, when operating, the operator must strictly wear appropriate protective equipment, such as protective gloves, goggles, gas masks, etc. Because it may cause irritation to the skin, eyes and respiratory tract, if it is inadvertently touched, it should be immediately rinsed with plenty of water and seek medical attention according to the specific situation.
    Third, the use environment should ensure smooth ventilation to prevent the local accumulation of volatile gases and the risk of poisoning. In the experimental or production environment, effective ventilation facilities and gas detection devices should be equipped to monitor the concentration of the substance in the air in real time.
    Fourth, when performing related reaction operations, it is necessary to accurately control the reaction conditions, such as temperature, pressure, reaction time, etc. Different reaction conditions may cause product differences, or cause side reactions, affecting product quality and yield. At the same time, the solvents and catalysts used in the reaction process also need to be properly selected and handled to avoid accidental reactions between incompatible substances.
    Fifth, after use, the remaining substances and waste should not be discarded at will, and should be properly disposed of in accordance with relevant regulations. Follow environmental protection requirements and use appropriate methods for harmless disposal to prevent environmental pollution.