4-Cyano-biphenylboric acid is primarily utilized in organic synthesis, particularly in cross-coupling reactions. It serves as a key intermediate in the preparation of complex organic molecules, often employed in the Suzuki-Miyaura reaction to form carbon-carbon bonds. This reaction is widely used in the pharmaceutical industry for the synthesis of active pharmaceutical ingredients (APIs) and in material science for creating advanced polymers and liquid crystals. Additionally, its boronic acid group makes it valuable in the development of sensors and probes for detecting biological molecules, contributing to advancements in diagnostic tools and biomedical research.