Chemical Identity and Key Properties

4-Bromo-2-iodo-1-(trifluoromethoxy)benzene (Aladdin SKU: B692900) is an aromatic compound carrying three distinct substituents on the benzene ring: a bromine atom at the 4-position, an iodine atom at the 2-position, and a trifluoromethoxy (-OCF3) group at the 1-position. The molecular formula is C₇H₃BrF₃IO.

The -OCF3 group is a strongly electron-withdrawing substituent that reduces electron density on the aromatic ring and enhances metabolic stability in drug candidates. The simultaneous presence of both bromine and iodine on the same ring provides two distinct electrophilic handles that can be exploited sequentially in multi-step synthesis, taking advantage of the well-established differential reactivity of C–I versus C–Br bonds toward transition-metal catalysis.

The compound is typically encountered as a liquid or low-melting solid at ambient temperature. Exact melting/boiling points and density should be confirmed against the current product certificate of analysis (CoA) from Aladdin Scientific.

Applications in Synthetic and Medicinal Chemistry

Sequential Cross-Coupling: The most important application of this reagent is as a bifunctional building block in sequential palladium- or nickel-catalyzed cross-coupling reactions. Because C–I bonds undergo oxidative addition to Pd(0) significantly faster than C–Br bonds under mild conditions, a chemist can first functionalize the iodo position—via Suzuki-Miyaura, Negishi, Sonogashira, or Buchwald-Hartwig coupling—and subsequently react the remaining aryl bromide under optimized conditions. This orthogonal reactivity enables efficient construction of complex, multiply substituted aromatic systems in fewer steps.

Fluorinated Pharmaceutical Intermediates: The -OCF3 motif is increasingly prevalent in approved drugs and drug candidates due to its ability to modulate lipophilicity (logP), membrane permeability, and metabolic resistance. This compound serves as a ready-made -OCF3-containing scaffold that synthetic chemists can elaborate into lead compounds or advanced intermediates for medicinal chemistry programs.

Materials Science: Polyfluorinated aryl halides are also employed in the synthesis of specialty polymers, liquid crystals, and functional organic materials, where the electron-withdrawing character and C–F bond stability impart desirable optoelectronic properties.

Handling, Safety, and Storage Guidelines

Personal Protective Equipment (PPE): When handling 4-Bromo-2-iodo-1-(trifluoromethoxy)benzene, wear appropriate PPE including chemical-resistant gloves (e.g., nitrile), safety glasses or goggles, and a laboratory coat. Work in a well-ventilated fume hood to minimize inhalation of vapors.

Hazard Considerations: As a halogenated aromatic compound, this reagent should be treated as potentially irritating to skin, eyes, and the respiratory tract. Always consult the current Safety Data Sheet (SDS) provided by Aladdin Scientific before use. Specific GHS hazard classifications should be verified from the SDS, as data for this specific compound may be limited.

Storage: Store in a tightly closed container, protected from light and atmospheric moisture. Keep at controlled room temperature (or as specified on the product label/CoA). Segregate from strong oxidizing agents and strong bases.

Waste Disposal: Dispose of waste material containing this compound in accordance with local, regional, and national regulations for halogenated organic waste. Do not pour down the drain.

Practical Tips for Cross-Coupling Reactions

Chemoselective Functionalization of C–I: To selectively react the aryl iodide in the presence of the aryl bromide, use mild reaction conditions: Pd(PPh₃)₄ or Pd(dppf)Cl₂ as catalyst, aqueous carbonate base (e.g., K₂CO₃), and a polar aprotic or aqueous co-solvent system at or below 60 °C. Under these conditions, the C–I bond reacts selectively.

Subsequent C–Br Functionalization: After isolating or in a telescoped second step, the remaining aryl bromide can be engaged using more forcing conditions or a more active catalyst system (e.g., Pd₂(dba)₃ with a bulky phosphine ligand such as SPhos or XPhos) to achieve the second coupling.

Moisture and Oxygen Sensitivity: Palladium-catalyzed reactions are sensitive to both oxygen and moisture. Degas all solvents using freeze-pump-thaw or sparging with inert gas (N₂ or Ar). Conduct reactions under inert atmosphere using standard Schlenk or glovebox techniques where required.

Purity Verification: Confirm reagent purity by ¹H NMR, ¹⁹F NMR, and GC or HPLC before use in sensitive multi-step sequences. Request the current CoA from Aladdin Scientific (SKU B692900) to verify lot-specific purity data.

Quality, Ordering, and Support

Catalog Information: 4-Bromo-2-iodo-1-(trifluoromethoxy)benzene is available from Aladdin Scientific under catalog number B692900. Multiple pack sizes may be available; contact Aladdin Scientific or visit the product page for current availability and pricing.

Certificate of Analysis: A lot-specific CoA including purity (GC or HPLC), NMR data, and physical characterization is available upon request or via the Aladdin Scientific website. Always match the lot number on the bottle to the CoA before use.

Technical Support: For application-specific inquiries, custom synthesis questions, or bulk quotations, contact the Aladdin Scientific technical support team. Our specialists can assist with reagent selection, reaction optimization guidance, and regulatory documentation.

Regulatory and Export: This compound contains iodine and may be subject to export control regulations in certain jurisdictions. Procurement teams should verify applicable regulations before placing international orders.