Compound Overview and Chemical Properties

7-Bromo-6-methoxy-2,3-dihydro-1H-inden-1-one belongs to the indanone family of compounds, characterized by a cyclopentanone ring fused to a benzene ring. The presence of a bromine atom at position 7 and a methoxy group at position 6 imparts distinct electronic and steric properties to the molecule, making it a versatile electrophilic partner and cross-coupling precursor.

The bromine substituent at the peri-position relative to the carbonyl enables selective participation in palladium-catalyzed cross-coupling reactions (e.g., Suzuki, Sonogashira, and Buchwald–Hartwig couplings), while the electron-donating methoxy group modulates the aromatic ring's reactivity. The indanone ketone functionality additionally allows condensation, reduction, and enolization chemistry, expanding the compound's utility as a multi-functional synthetic building block.

Safety, Storage, and Handling Precautions

Personal Protective Equipment (PPE): Always wear appropriate PPE when handling this compound, including chemical-resistant gloves (nitrile recommended), a laboratory coat, and safety goggles. Work in a well-ventilated fume hood to minimize inhalation exposure to fine particles or vapors.

Storage: Store 7-Bromo-6-methoxy-2,3-dihydro-1H-inden-1-one in a tightly sealed container under cool (2–8 °C or room temperature as specified on the Certificate of Analysis), dry, and dark conditions to prevent degradation from moisture, heat, or light exposure. Keep away from incompatible materials such as strong oxidizers and strong bases.

Waste Disposal: Dispose of all waste materials in accordance with applicable local, regional, and national regulations for halogenated organic compounds. Do not pour down the drain. Consult your institution's Environmental Health and Safety (EHS) office for guidance.

Note: Consult the product-specific Safety Data Sheet (SDS) for complete hazard and first-aid information before use.

Standard Protocol: Weighing and Solution Preparation

Materials Required: 7-Bromo-6-methoxy-2,3-dihydro-1H-inden-1-one (SKU B195631), analytical balance, suitable glassware (volumetric flask or Schlenk flask), appropriate organic solvent (e.g., dichloromethane, DMF, THF, or DMSO depending on application), inert gas line (nitrogen or argon) if moisture/oxygen sensitivity is required.

1. Pre-weighing preparation: Allow the sealed vial to equilibrate to room temperature before opening to prevent moisture condensation on the solid. Conduct all weighing operations in the fume hood.
2. Weighing: Tare the appropriate vessel on an analytical balance. Carefully transfer the required quantity of compound using a clean spatula. Record the exact mass.
3. Dissolution: Add the pre-measured volume of dry, degassed solvent to the weighed solid. For reactions requiring anhydrous conditions, use Schlenk technique under an inert atmosphere. Stir or sonicate gently until complete dissolution is achieved.
4. Concentration verification: Confirm the solution concentration by back-calculation from the recorded mass and volume. For critical applications, verify purity by TLC, HPLC, or NMR as appropriate.
5. Unused material: Re-seal the original container tightly under an inert gas blanket if possible and return to recommended storage conditions promptly.

Applications in Synthetic Chemistry

7-Bromo-6-methoxy-2,3-dihydro-1H-inden-1-one serves as a versatile synthetic intermediate in several key reaction classes:

• Palladium-catalyzed cross-coupling: The aryl bromide functionality participates in Suzuki–Miyaura, Negishi, Stille, and Sonogashira reactions to install diverse aryl, heteroaryl, vinyl, or alkynyl groups at position 7, enabling rapid diversification of the indanone scaffold.
• Buchwald–Hartwig amination: The C–Br bond can be converted to C–N bonds, providing access to aminoindanone derivatives of pharmacological interest.
• Ketone-based transformations: The ketone at position 1 undergoes Wittig olefination, reductive amination, aldol condensation, and nucleophilic addition, allowing further functionalization of the five-membered ring.
• Directed metalation: The combination of the methoxy group and carbonyl can direct ortho-lithiation or other directed C–H functionalization strategies on the aromatic ring.
• Medicinal chemistry: The brominated methoxy-indanone core appears in synthetic routes toward biologically active compounds, including kinase inhibitors and other pharmacophore scaffolds. Researchers should verify specific biological applications against primary literature.

Quality Control and Troubleshooting

Purity Assessment: Confirm compound identity and purity upon receipt using the Certificate of Analysis (CoA) provided with each batch. For critical experiments, independent verification by ¹H NMR, ¹³C NMR, and HPLC is recommended. The CoA will specify the analytical data for the specific lot.

Common Issues and Solutions:

• Poor solubility: If dissolution is slow or incomplete, gentle warming (40–50 °C) or brief sonication in the chosen solvent may help. Switching to a more polar solvent (e.g., DMF or DMSO) typically improves solubility.
• Discoloration of stored material: Slight discoloration over time may indicate partial oxidation or degradation. Re-evaluate purity by TLC or HPLC before use in sensitive reactions.
• Low coupling yields: In cross-coupling reactions, ensure the use of anhydrous, degassed solvents, high-purity palladium catalyst, and appropriate base. Check for catalyst poisoning by halide impurities.
• Moisture contamination: Azeotropic drying of solutions with toluene or use of molecular sieves can mitigate adventitious water in moisture-sensitive reactions.

Contact Aladdin Scientific technical support if you observe quality issues inconsistent with the CoA.