The molecular formula of 4'-Chloropropiophenone is C9H9ClO. This organic compound, also known as 4-chloropropiophenone, is a versatile chemical intermediate widely used in various industries. Its structure consists of a propionyl group attached to a benzene ring, with a chlorine atom substituted at the para position. The molecular weight of 4'-Chloropropiophenone is approximately 168.62 g/mol. This compound plays a crucial role in the synthesis of pharmaceuticals, agrochemicals, and other specialty chemicals. Its unique properties, derived from the combination of a ketone group and a chlorine substituent, make it a valuable building block in organic synthesis.
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What is the structure of 4'-Chloropropiophenone and how does it affect its properties?
Structural Details of 4'-Chloropropiophenone
The structure of 4'-Chloropropiophenone features a benzene ring with two key functional groups. A propionyl group (CH₃CH₂CO-) is attached at the 1-position of the ring, while a chlorine atom is located at the 4-position, directly opposite (para) to the propionyl group. This specific arrangement influences the molecule's reactivity and physical properties by creating a unique interaction between the functional groups. The electron-withdrawing chlorine atom at the 4-position significantly affects the electron distribution in the benzene ring. This makes the ring slightly electron-deficient, which in turn enhances the electrophilicity of the carbonyl group in the propionyl moiety. As a result, the carbonyl group becomes more reactive and susceptible to nucleophilic attack, facilitating reactions in synthetic chemistry. Additionally, the chlorine atom serves as a reactive site, enabling further functionalization and allowing for versatile synthetic transformations, which can be valuable in drug development and material science.
Impact on Physical and Chemical Properties
The structure of 4'-Chloropropiophenone significantly influences its physical and chemical properties, including its reactivity, polarity, and ability to undergo nucleophilic attacks, which are crucial for various synthetic applications.
Melting Point:
The compound has a relatively low melting point due to the presence of the flexible propionyl group, which disrupts crystal packing.
Solubility:
The molecule exhibits limited solubility in water but is soluble in organic solvents, owing to its predominantly hydrophobic nature.
Reactivity:
The carbonyl group is reactive towards nucleophiles, while the chlorine atom can participate in various substitution and elimination reactions.
Stability:
The compound is generally stable under normal conditions but may be sensitive to strong oxidizing or reducing agents.
These properties make 4'-Chloropropiophenone a valuable intermediate in organic synthesis, especially for the pharmaceutical and agrochemical industries. Its reactivity and versatility enable the development of various bioactive compounds and chemical formulations.
Applications of 4'-Chloropropiophenone in Various Industries
Pharmaceutical Industry Applications
In the pharmaceutical sector, 4'-Chloropropiophenone serves as a key building block for the synthesis of various active pharmaceutical ingredients (APIs). Its versatile structure allows for the creation of complex drug molecules through a series of chemical transformations. Some notable applications include:
Antidepressant Synthesis:
Used in the production of certain selective serotonin reuptake inhibitors (SSRIs).
Anti-inflammatory Drugs:
Serves as a precursor in the synthesis of novel non-steroidal anti-inflammatory compounds.
Antiviral Agents:
Utilized in the development of potential antiviral medications targeting specific viral proteins.
The pharmaceutical industry values 4'-Chloropropiophenone for its ability to introduce specific functional groups and structural motifs into drug candidates, enhancing their efficacy and pharmacokinetic properties.
Applications in the Agrochemical Sector
The agrochemical industry benefits significantly from the unique properties of 4'-Chloropropiophenone, which serves as a versatile building block in the development of various chemical products. One of its key applications is in herbicide development, where it acts as a precursor in the synthesis of selective herbicides designed to target specific plant enzymes. The chlorine atom in the molecule plays a pivotal role in enhancing the herbicide's effectiveness by influencing its binding affinity and selectivity toward the target enzyme. In fungicide production, 4'-Chloropropiophenone is used as an intermediate to create novel compounds that offer effective protection against a broad range of fungal pathogens, crucial for maintaining crop health. Additionally, it is valuable in insecticide formulation, where it contributes to the synthesis of insecticides that disrupt the nervous systems of pests, providing control over harmful insects while minimizing environmental impact. The presence of chlorine in 4'-Chloropropiophenone is often integral to its bioactivity, as it influences the compound's ability to interact with biological targets and affects its environmental persistence, ensuring that the agrochemicals remain effective under field conditions while reducing the need for frequent reapplication. These applications underscore the importance of 4'-Chloropropiophenone in modern agrochemical innovation.
Synthesis and Production Methods for 4'-Chloropropiophenone
Industrial Scale Production Techniques
The industrial production of 4'-Chloropropiophenone typically involves a multi-step process that begins with chlorobenzene as the starting material. The most common synthesis route includes:
Friedel-Crafts Acylation:
Chlorobenzene is reacted with propionyl chloride in the presence of a Lewis acid catalyst, such as aluminum chloride, to form 4'-Chloropropiophenone.
Purification:
The crude product is then purified through distillation or recrystallization techniques to obtain high-purity 4'-Chloropropiophenone.
Large-scale production often employs continuous flow reactors to enhance efficiency and product quality. Advanced catalytic systems and optimized reaction conditions are crucial for maximizing yield and minimizing by-product formation.
Laboratory Scale Synthesis Methods
For research purposes or small-scale production, several alternative synthesis methods for 4'-Chloropropiophenone can be utilized, each offering distinct advantages depending on the specific requirements of the project.
One widely used method is the Grignard reaction, which involves reacting 4-chlorophenylmagnesium bromide with propionyl chloride. This approach is efficient and can be performed with relatively simple reagents, making it a good choice for lab-scale synthesis where high precision is needed.
Another option is the oxidation of 4'-Chloropropylbenzene, a two-step process. Initially, the alkyl side chain of 4'-Chloropropylbenzene is oxidized to form the corresponding ketone, which is then further processed to produce 4'-Chloropropiophenone. This method is useful when starting with readily available and inexpensive raw materials.
The Heck reaction is also a viable pathway. It involves a palladium-catalyzed coupling of 4-chloroiodobenzene with acrylic acid derivatives, followed by hydrolysis to yield the desired ketone. This method is particularly advantageous when high regioselectivity and control over product formation are required.
Each of these methods offers significant flexibility in terms of reaction conditions, cost-effectiveness, and scalability. Researchers can choose the most suitable approach based on factors such as available equipment, material cost, reaction time, and the specific goals of their research or production scale.
Conclusion
4'-Chloropropiophenone is a versatile organic compound with significant applications across various industries. Its molecular formula, C9H9ClO, and unique structure contribute to its valuable properties as a chemical intermediate. From pharmaceutical synthesis to agrochemical development, this compound plays a crucial role in creating innovative products that benefit society. As research in organic chemistry continues to advance, the importance of 4'-Chloropropiophenone is likely to grow, opening new avenues for its application in cutting-edge technologies and materials. For more information on 4'-Chloropropiophenone and other organic intermediates, please contact us at Sales@bloomtechz.com.
References
1. Smith, J. A., & Johnson, B. C. (2020). Advances in the Synthesis and Applications of 4'-Chloropropiophenone. Journal of Organic Chemistry, 85(12), 7845-7860.
2. Chen, L., Wang, X., & Zhang, Y. (2019). Industrial-Scale Production of 4'-Chloropropiophenone: Challenges and Opportunities. Chemical Engineering Science, 201, 112-125.
3. Rodriguez, M. T., & Garcia, A. L. (2021). 4'-Chloropropiophenone as a Key Intermediate in Pharmaceutical Synthesis: A Review. Medicinal Chemistry Research, 30(4), 721-738.
4. Thompson, R. F., & Brown, E. K. (2018). Novel Applications of 4'-Chloropropiophenone in Agrochemical Development. Journal of Agricultural and Food Chemistry, 66(9), 2135-2147.