3-Bromo-6-methoxyquinoline is an organic compound featuring a quinoline core substituted with a bromine atom at the 3-position and a methoxy group at the 6-position. It is a solid with a molecular formula of C10H8BrNO and a molecular weight of 238.08 g/mol. This compound serves as a versatile and valuable building block in medicinal chemistry and organic synthesis. Its primary application is as a key synthetic intermediate in the development of pharmaceutical candidates. The bromine atom at the 3-position is a reactive site amenable to various cross-coupling reactions, such as Suzuki, Stille, or Buchwald-Hartwig couplings, enabling the introduction of diverse aryl, heteroaryl, or amine substituents. This makes it particularly useful for constructing complex heterocyclic scaffolds found in bioactive molecules. The 6-methoxy group can influence the electronic properties and solubility of the molecule. As a halogenated quinoline derivative, it is a fundamental organic synthesis block. It is commonly used in research settings to explore structure-activity relationships (SAR) and to synthesize libraries of compounds for biological screening. Standard safety precautions for handling halogenated aromatic compounds should be observed.