4-Bromoaniline丨CAS 106-40-1

4-Bromoaniline is an aromatic amine widely used as an intermediate in pharmaceutical, agrochemical, and dye chemistry. It serves as a key building block for the synthesis of azo dyes, pigments, and functionalized heterocyclic compounds, where the bromo group enables selective substitution reactions while the amino group participates in coupling or acylation reactions. In pharmaceuticals, 4-bromoaniline is used as a precursor for bioactive molecules, enzyme inhibitors, and intermediates in drug discovery. In agrochemical research, it is applied in the preparation of herbicides, fungicides, and pesticide intermediates. Additionally, it is used in fine chemical and materials research for producing specialty compounds, polymer additives, and corrosion inhibitors. Its dual functionality allows versatile transformations, making it a widely employed reagent in laboratory and industrial organic synthesis.

The benefits of 4-bromoaniline arise from its bifunctional reactivity, chemical stability, and ease of handling. The amino group allows nucleophilic reactions such as acylation, diazotization, and coupling, while the bromine atom provides a site for selective substitution, cross-coupling, or functionalization. It is soluble in common organic solvents and stable under normal storage conditions, enabling reproducible and high-yield reactions. Its versatility allows chemists to construct complex aromatic and heterocyclic structures efficiently. These properties make 4-bromoaniline a reliable intermediate for the synthesis of pharmaceuticals, dyes, agrochemicals, and specialty chemicals.