4-(Aminomethyl)phenylboronic acid is an organic compound featuring both a primary amine (-CH2NH2) and a boronic acid (-B(OH)2) functional group attached to a benzene ring. This bifunctional structure makes it a versatile building block in synthetic chemistry. Its primary application is as a key intermediate in the synthesis of more complex molecules, particularly through Suzuki-Miyaura cross-coupling reactions facilitated by the boronic acid group. The amine group serves as a handle for further derivatization, such as amide bond formation or as a coordination site. It is commonly used in the preparation of pharmaceutical intermediates, bioactive compounds, and functional materials where a phenylboronic acid moiety linked to an amine-containing side chain is required. The compound is typically handled under inert atmosphere due to the sensitivity of the boronic acid group to protodeboronation and oxidation. It is a solid at room temperature and requires storage in a cool, dry place.