For chemists and product formulators, a deep understanding of a chemical intermediate's properties and synthesis is crucial for successful application. 3-Fluoro-4-bromobenzyl bromide (CAS 127425-73-4) stands out as a key compound in organic synthesis, particularly for its role in creating advanced materials and pharmaceutical compounds. This article delves into its fundamental chemical characteristics and common manufacturing pathways, providing insights for professionals looking to purchase or utilize this valuable intermediate.

Understanding the Chemical Profile

The chemical structure of 3-Fluoro-4-bromobenzyl bromide features a benzene ring substituted with a fluorine atom at the 3-position, a bromine atom at the 4-position, and a bromomethyl group (-CH2Br) attached to the ring. Its molecular formula is C7H5Br2F, and its molecular weight is approximately 267.92 g/mol. Key physical properties include:

  • Appearance: Typically a white to light yellow crystalline solid or needles.
  • Melting Point: 33-36 °C, indicating its solid state at room temperature.
  • Boiling Point: Approximately 252 °C at atmospheric pressure.
  • Density: Around 1.923 g/cm³, suggesting a relatively dense compound.
  • Flash Point: 106 °C, denoting a moderate flammability risk.

The presence of both fluorine and bromine atoms, along with the reactive bromomethyl group, imparts significant chemical reactivity. The fluorine atom, due to its high electronegativity, can influence electron distribution in the molecule, while the bromine atoms serve as potential leaving groups or sites for further functionalization.

Synthesis Routes: From Raw Materials to Product

The synthesis of 3-Fluoro-4-bromobenzyl bromide typically begins with readily available precursors. A common route involves the benzylic bromination of 3-fluoro-4-bromotoluene. The general procedure often includes:

  1. Starting Material: 4-bromo-3-fluorotoluene (CAS 452-74-4) is a primary precursor.
  2. Brominating Agent: N-bromosuccinimide (NBS) is commonly used as the source of bromine for benzylic bromination.
  3. Initiator: A radical initiator, such as dibenzoyl peroxide (DBP), is added to facilitate the reaction under reflux conditions.
  4. Solvent: Acetonitrile is a frequently employed solvent for this reaction.
  5. Reaction Conditions: The mixture is heated to reflux for several hours.
  6. Work-up and Purification: After cooling, the product is typically isolated through extraction, washing, drying, and solvent removal. The yield is often reported to be around 90%.

This synthesis method highlights the importance of careful control over reaction parameters to achieve high yields and purity. Understanding these processes is essential for R&D scientists and procurement specialists when evaluating manufacturers.

As a supplier committed to quality, we provide 3-Fluoro-4-bromobenzyl bromide that adheres to strict synthesis protocols. Whether you are looking to buy for pharmaceutical intermediate use or for material science research, understanding its chemical properties and how it's manufactured allows for informed purchasing decisions from reliable manufacturers and suppliers.