What Is 4-Bromo-5-fluoro-2-iodoaniline?

4-Bromo-5-fluoro-2-iodoaniline (Aladdin SKU B172676) is a polyhalogenated aniline derivative bearing three different halogen substituents—bromine, fluorine, and iodine—on a single benzene ring, together with a primary amino group (–NH₂). This unique substitution pattern makes it exceptionally valuable as a multi-functional building block in organic synthesis.

The compound belongs to the broader class of halogenated anilines, which are widely employed as starting materials and intermediates in the preparation of active pharmaceutical ingredients (APIs), agrochemicals, and functional materials. The presence of three distinct halogens on one ring allows chemists to exploit differences in reactivity to perform sequential, chemoselective transformations.

Key Chemical Properties and Reactivity

The reactivity profile of 4-bromo-5-fluoro-2-iodoaniline is governed by the inherent differences in carbon–halogen bond strengths and the electronic influence of the amino group. In transition-metal-catalyzed cross-coupling chemistry (e.g., Suzuki–Miyaura, Sonogashira, Buchwald–Hartwig), the aryl–iodide bond undergoes oxidative addition to palladium(0) or nickel(0) centers most readily, followed by the aryl–bromide bond. The aryl–fluoride bond is substantially less reactive under standard cross-coupling conditions and is typically reserved for nucleophilic aromatic substitution (SNAr) or late-stage fluorine-specific manipulations.

The free –NH₂ group is ortho to the iodo substituent and para to the bromo group. This positioning can facilitate directed metalation reactions and also enables derivatization via diazotization, acylation, sulfonylation, or reductive amination. Researchers should note that the amino group may coordinate to metal catalysts, so protection (e.g., as an acetamide or Boc carbamate) is often advisable before cross-coupling steps.

Storage recommendations for aryl iodides and halogenated anilines generally include cool, dry, dark conditions to prevent oxidative degradation; specific storage conditions for B172676 should be confirmed on the product datasheet.

Synthetic Applications and Use Cases

The principal value of 4-bromo-5-fluoro-2-iodoaniline lies in its ability to serve as a differentiated multi-electrophilic partner in multi-step synthesis:

• Sequential cross-coupling: Chemists can first engage the C–I bond in a Sonogashira or Suzuki coupling to install one fragment, then use the C–Br bond in a second coupling cycle, reserving the C–F for SNAr or directed functionalization. This orthogonal reactivity enables rapid construction of complex, polysubstituted arenes.
• Pharmaceutical intermediate synthesis: Polyhalogenated anilines with fluorine substituents are common precursors to kinase inhibitors, PET imaging agents, and other bioactive molecules. The fluorine atom can modulate lipophilicity, metabolic stability, and binding affinity in drug candidates.
• Agrochemical research: Halogenated anilines serve as core scaffolds for herbicides and fungicides; the combination of Br, F, and I provides flexibility for structure–activity relationship (SAR) studies.
• Materials science: Aryl iodides and anilines are used in the synthesis of organic semiconductors, dyes, and ligands for coordination chemistry.

Because the iodo substituent is ortho to the amine, researchers exploring directed ortho-metalation or cyclization chemistry (e.g., forming benzimidazoles, indazoles, or related heterocycles) may find this compound particularly useful.

Handling, Safety, and Storage

As with all halogenated anilines, 4-bromo-5-fluoro-2-iodoaniline should be handled with appropriate precautions. Aromatic amines as a chemical class may present health hazards; consult the Safety Data Sheet (SDS) for B172676 provided by Aladdin Scientific before use.

General good-practice guidelines include: use in a well-ventilated fume hood; wear suitable personal protective equipment (PPE) including nitrile gloves, safety glasses, and a lab coat; avoid inhalation of dust or vapors; and wash hands thoroughly after handling. Waste disposal must comply with applicable local regulations for halogenated organic compounds.

For storage, keep the reagent tightly sealed in its original container, protected from light, moisture, and heat. Specific temperature recommendations (e.g., room temperature, 2–8 °C) should be taken from the current product datasheet available on the Aladdin Scientific website for SKU B172676.

Ordering and Availability from Aladdin Scientific

4-Bromo-5-fluoro-2-iodoaniline is available from Aladdin Scientific under SKU B172676. Researchers and procurement teams can search for this SKU directly on the Aladdin Scientific website to view current pricing, available pack sizes, purity specifications, and stock status.

If you require a custom quantity, a certificate of analysis (CoA), or have technical questions about this reagent, please contact Aladdin Scientific's customer service team. Bulk or custom-purity orders may be accommodated upon request, subject to availability and lead times.

Aladdin Scientific is committed to providing high-quality research reagents with full documentation, including SDS, CoA, and spectral data where available, to support your research workflow from procurement through to publication.