α-Bromo-4-methoxyacetophenone
Overview
α-Bromo-4-methoxyacetophenone is a brominated aromatic ketone with the molecular formula C9H9BrO2. It is commonly used as an intermediate in organic synthesis, particularly in the pharmaceutical industry. The compound is known for its reactivity, making it valuable for constructing complex molecules. The chemical is typically supplied as a white to pale yellow crystalline powder. It is stable under recommended storage conditions but should be handled with care due to its irritant properties. Its synthesis involves bromination of 4-methoxyacetophenone, a process well-documented in organic chemistry literature.
Physical and Chemical Properties
α-Bromo-4-methoxyacetophenone has a molecular weight of 229.07 g/mol and a melting point range of 70-74°C. It is soluble in common organic solvents such as ethanol, acetone, and dichloromethane, but has limited solubility in water. The compound exhibits typical ketone reactivity, including participation in nucleophilic substitution reactions due to the bromine substituent. Its aromatic methoxy group contributes to the compound's stability and influences its electronic properties, making it useful in photochemical applications. The bromine atom provides a handle for further functionalization, enabling diverse synthetic transformations.
Main Applications
The primary use of α-Bromo-4-methoxyacetophenone is as a building block in pharmaceutical synthesis. It serves as an intermediate for various active pharmaceutical ingredients (APIs) and fine chemicals. The compound's reactivity makes it particularly valuable for introducing the 4-methoxyphenacyl moiety into target molecules. In research settings, it is employed in organic synthesis methodologies and as a photoactivatable protecting group. The compound's ability to release reactive species upon irradiation has found applications in photochemistry and materials science, though these uses are more specialized compared to its pharmaceutical applications.
Safety and Storage
α-Bromo-4-methoxyacetophenone requires careful handling due to its potential to cause skin and eye irritation. Appropriate personal protective equipment (PPE) including gloves, goggles, and lab coats should be worn when working with this compound. Operations should be conducted in a well-ventilated area or fume hood. For storage, the chemical should be kept in a tightly sealed container in a cool, dry place away from light and moisture. It is stable under these conditions for extended periods but should be protected from strong oxidizing agents. In case of accidental exposure, affected areas should be flushed with plenty of water and medical attention sought if irritation persists.
B2B Procurement Guide
When procuring α-Bromo-4-methoxyacetophenone commercially, buyers should verify the supplier's certification and quality control measures. The compound is typically available in various packaging options ranging from grams to kilograms, with purity levels usually ≥98%. Technical specifications should be clearly stated in purchase agreements. Lead times may vary depending on supplier inventory and production schedules. For bulk purchases, it's advisable to negotiate pricing and confirm storage capabilities at the receiving facility. International shipments require proper hazardous materials documentation, though the compound is not typically classified as highly hazardous under most transport regulations.
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