4-(N-Boc-amino)phenylboronic acid is a bifunctional organic compound featuring both a boronic acid group and a tert-butoxycarbonyl (Boc)-protected aniline moiety. This white to off-white solid is a key building block in modern synthetic chemistry, particularly in Suzuki-Miyaura cross-coupling reactions, where the boronic acid group facilitates the formation of new carbon-carbon bonds with aryl or vinyl halides. Its primary application is in the pharmaceutical industry as a versatile intermediate for constructing complex molecules. The Boc-protected amino group allows for selective deprotection and further functionalization, making it crucial for synthesizing active pharmaceutical ingredients (APIs) and drug candidates, especially those containing biaryl or aniline pharmacophores. It is widely used in medicinal chemistry research and the development of new therapeutic agents. The compound is commercially available from major chemical suppliers and is typically handled under inert atmosphere due to the sensitivity of the boronic acid group to protodeboronation under certain conditions. It serves as a fundamental reagent in both academic and industrial settings for the synthesis of diverse chemical libraries.