3-Bromo-2,5-difluoroaniline

This compound typically appears as a white to off-white crystalline solid at ambient temperature . It possesses a molecular weight of 208.00 g/mol and a molecular formula of C6H4BrF2N . The calculated boiling point is approximately 228.6±35.0 °C at 760 mmHg, and the predicted density is around 1.788±0.06 g/cm³ . It exhibits good stability when stored under appropriate conditions; however, it is recommended to store the material at 2-8 °C and protect it from light to maintain its integrity over extended periods . The compound is classified with GHS07 pictograms and carries the signal word "Warning". It is associated with hazard statements H302 (Harmful if swallowed), H315 (Causes skin irritation), H319 (Causes serious eye irritation), and H335 (May cause respiratory irritation), necessitating standard laboratory safety precautions during handling .

3-Bromo-2,5-difluoroaniline is a polysubstituted aniline derivative characterized by the presence of bromine and fluorine atoms on the aromatic ring . The strategic placement of these halogens-bromine at the 3-position and fluorine atoms at the 2- and 5-positions-creates a molecule with a distinct electronic and steric profile . The amino group offers a site for diversification through various reactions, such as amide bond formation or diazotization, while the bromine atom serves as a versatile handle for transition metal-catalyzed cross-coupling reactions like Suzuki-Miyaura or Buchwald-Hartwig aminations . The fluorine atoms can significantly influence the compound's metabolic stability, lipophilicity, and binding affinity to biological targets, making this aniline a valuable intermediate in the construction of more complex functional molecules .

Pharmaceutical Synthesis
In medicinal chemistry, this compound is utilized as a key building block for assembling drug candidates, particularly those targeting kinases and other enzymes where halogen bonding and precise electronic modulation are crucial . The 2,5-difluoro substitution pattern can enhance the binding selectivity and metabolic stability of active pharmaceutical ingredients (APIs). It serves as a precursor for anilide-based pharmacophores and can be incorporated into heterocyclic systems via cross-coupling reactions to generate compound libraries for neurological and oncological targets.

Agrochemical R&D
This aniline derivative functions as a core synthon in the discovery of novel crop protection agents . The presence of both bromine and fluorine atoms is highly advantageous for optimizing the physicochemical properties of insecticides, fungicides, and herbicides. It can be used to create molecules that disrupt specific biochemical pathways in pests, with the halogen atoms contributing to enhanced target affinity and favorable environmental persistence profiles.

Material Science
The unique substitution pattern of 3-bromo-2,5-difluoroaniline makes it a candidate for developing advanced organic materials. It can act as a monomer or an intermediate in the synthesis of conjugated polymers, organic light-emitting diodes (OLEDs), and other organic electronic components where the electron-withdrawing fluorine atoms and the bromine handle allow for precise tuning of the material's electronic properties and band gap.

Organic Synthesis Building Block
As a multifunctional building block, it is indispensable in organic synthesis for creating complex molecular architectures . The bromine atom is a classic partner in palladium-catalyzed cross-coupling reactions (e.g., Suzuki, Stille, Negishi), allowing for the construction of biaryl compounds . The aniline group can be transformed into various functional groups, including diazonium salts for further substitution or azo coupling. This dual reactivity provides a versatile platform for the rapid assembly of diverse chemical libraries and natural product analogs .