Methyl 4-Bromobutyrate: Properties, Synthesis & Applications

Basic Information

Synonyms:Methyl 4-bromobutanoate, 4-Bromobutyric acid methyl ester

CAS No:4897-84-1

Molecular Formula:C5H9BrO₂

Molecular Weight:181.03

Physical State:Colorless to pale yellow liquid

Melting Point:175–190 °C

Boiling Point:186–187 °C

Density:1.434 g/mL

Uses:Can be used to prepare cyclopropylmethanamine derivatives, which are important highly active compounds.

Methyl 4-bromobutyrate (CAS: 4897-84-1) is a key pharmaceutical intermediate widely used in pharmaceuticals, agrochemicals, and chemical industries. Its critical role in drug synthesis makes it an indispensable raw material in pharmaceutical processes. This article provides a detailed introduction to the molecular structure, chemical properties, synthesis methods, and main application areas of methyl 4-bromobutyrate, helping you fully understand the value and prospects of this product.

1. Molecular Structure of Methyl 4-Bromobutyrate

The chemical formula of methyl 4-bromobutyrate is C₅H₉BrO₂. It consists of butyric acid with a bromine substituent. In its molecular structure, the bromine atom is located at the fourth carbon of the butyric acid chain, giving it unique chemical properties and reactivity.

From its molecular structure, it can be seen as a moderately hydrophilic organic compound with good stability. The presence of bromine endows the molecule with strong reactivity under certain conditions, allowing it to participate in various chemical reactions such as transesterification and nucleophilic substitution.

2. Chemical Properties of Methyl 4-Bromobutyrate

The chemical properties of methyl 4-bromobutyrate determine its wide range of industrial applications. As an organobromine compound, it plays a significant role in many reactions. Key chemical characteristics include:

Bromination:The bromine atom exhibits strong nucleophilic reactivity with nucleophilic reagents, making it suitable for synthesizing various pharmaceuticals and chemicals.

Esterification:As an ester, methyl 4-bromobutyrate can react with various alcohols to form different esterification products, widely used in pharmaceutical and chemical industries.

Stability:Under normal temperature and pressure, methyl 4-bromobutyrate is relatively stable, but under high temperature or strong alkaline conditions, it may undergo hydrolysis or other degradation reactions.

3. Synthesis Process of Methyl 4-Bromobutyrate

Methyl 4-bromobutyrate is typically synthesized by reacting butyric acid with a brominating agent. The common synthesis method is as follows:

Raw materials:Butyric acid, brominating agent (e.g., hydrogen bromide, hydrobromic acid, etc.)

Reaction conditions:The reaction is usually carried out under anhydrous conditions, often using solvents such as dichloromethane or dimethyl sulfoxide (DMSO) as reaction media.

Procedure:First, mix butyric acid with the brominating agent, then heat to promote the combination of bromine with the butyric acid molecule to form methyl 4-bromobutyrate. During the reaction, temperature and reaction time must be strictly controlled to improve product purity and yield.

The advantages of this reaction are mild conditions, rapid reaction, and high yield, making it suitable for large-scale industrial production.

4. Main Application Fields of Methyl 4-Bromobutyrate

As an important pharmaceutical intermediate, methyl 4-bromobutyrate is widely used in pharmaceuticals, agrochemicals, and chemicals. Its main applications are as follows:

4.1 Pharmaceutical Industry

In the pharmaceutical industry, methyl 4-bromobutyrate is commonly used as an intermediate for synthesizing important drugs. For example, it can be used to synthesize antitumor drugs, antibiotics, and other active pharmaceutical ingredients. Through its reactivity, methyl 4-bromobutyrate can undergo nucleophilic reactions with other molecules to form new drug molecules.

4.2 Agrochemical Industry

methyl 4-bromobutyrate is also widely used in the synthesis of agrochemicals, especially in the production of certain herbicides and insecticides. Its bromination property makes it important for preparing biologically active chemicals.

4.3 Chemical Synthesis

As an important chemical raw material, methyl 4-bromobutyrate is widely used in chemical synthesis. For example, it can be used as a raw material for synthesizing plastic additives, fragrances, dyes, and other chemicals. Its high reactivity makes it a key intermediate in many complex organic synthesis reactions.

4.4 Other Applications

In addition, methyl 4-bromobutyrate is used in other specific fields, including the production of coatings, adhesives, and surfactants.

5. Market Prospects of Methyl 4-Bromobutyrate

With the continuous development of the global pharmaceutical, agrochemical, and chemical industries, the market demand for methyl 4-bromobutyrate is steadily increasing. Particularly in the pharmaceutical and agrochemical sectors, as new drugs and eco-friendly pesticides are developed, the market prospects for methyl 4-bromobutyrate as a key intermediate are broad. Moreover, growing demand in some developing countries offers more business opportunities for manufacturers.

Methyl 4-bromobutyrate, as an important pharmaceutical intermediate, has become an indispensable raw material in the pharmaceutical, chemical, and agrochemical industries due to its unique molecular structure and wide range of applications. With continuous optimization of its synthesis process and increasing market demand, the future development prospects of methyl 4-bromobutyrate are worth looking forward to.

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