What Is 1-Bromo-4-(isopropylsulfonyl)benzene?

1-Bromo-4-(isopropylsulfonyl)benzene is an aromatic organobromine compound in which a bromine atom and an isopropylsulfonyl (–SO₂CH(CH₃)₂) group are positioned para to each other on a benzene ring. The sulfonyl group is strongly electron-withdrawing, significantly reducing electron density at the ring and at the carbon bearing the bromine atom. This electronic profile makes the compound an attractive electrophilic partner in a wide range of synthetic transformations, including palladium-catalyzed cross-coupling reactions such as Suzuki–Miyaura, Buchwald–Hartwig, and Negishi couplings. The compound is typically encountered as a solid and should be stored under cool, dry conditions away from moisture and incompatible materials.

Key Applications in Synthetic and Medicinal Chemistry

The para-bromosulfonylbenzene motif present in 1-Bromo-4-(isopropylsulfonyl)benzene is widely exploited in synthetic chemistry for the following purposes:

• Cross-coupling reactions: The C–Br bond readily undergoes oxidative addition to Pd(0) catalysts, enabling Suzuki–Miyaura (with boronic acids/esters), Negishi (with organozincs), and Sonogashira (with terminal alkynes) couplings to install diverse carbon frameworks bearing the sulfonyl pharmacophore.
• Nucleophilic aromatic substitution (SNAr): The electron-withdrawing sulfonyl group activates the ring toward SNAr reactions when additional leaving groups are present, facilitating introduction of nitrogen, oxygen, or sulfur nucleophiles.
• Pharmaceutical intermediate synthesis: Sulfonyl-containing arenes are established pharmacophores in kinase inhibitors, antibacterial agents, and other drug candidates. This compound provides a convenient entry point to such scaffolds.
• Agrochemical and materials research: Isopropylsulfonyl arenes are also explored as intermediates in agrochemical synthesis and in the design of functional organic materials.

Handling, Storage, and Safety Guidelines

As with all organobromine reagents, appropriate laboratory precautions should be observed when working with 1-Bromo-4-(isopropylsulfonyl)benzene:

• Personal protective equipment (PPE): Wear chemical-resistant gloves, safety glasses or goggles, and a laboratory coat. Avoid inhalation of dust or aerosols.
• Storage: Store in a tightly sealed container in a cool (typically 2–8 °C or room temperature depending on confirmed specification), dry location away from strong oxidizers, strong acids, and sources of ignition.
• Disposal: Dispose of waste material in accordance with local, regional, and national regulations governing halogenated organic compounds.
• First aid: In case of skin or eye contact, flush thoroughly with water and seek medical advice if irritation persists. Refer to the product Safety Data Sheet (SDS) for complete hazard information.

Note: Always consult the Aladdin Scientific SDS for product-specific hazard classifications and first-aid measures before use.

Ordering and Specifications at Aladdin Scientific

1-Bromo-4-(isopropylsulfonyl)benzene is available from Aladdin Scientific under SKU B729692. When placing an order, researchers and procurement teams should consider the following:

• Purity and grade: Confirm the purity specification listed on the product page or certificate of analysis (CoA) to ensure suitability for your application. For sensitive coupling reactions, higher purity grades are recommended.
• Pack sizes: Multiple pack sizes may be available to suit both small-scale research and larger preparative needs. Contact Aladdin Scientific for bulk or custom quantity inquiries.
• Documentation: A CoA, SDS, and product specification sheet can be requested at the time of purchase or through the Aladdin Scientific customer service team.
• Shipping: The compound should be shipped and stored according to conditions specified in the SDS. Check regional availability and any import/export restrictions applicable to organobromine compounds.