Isoxazole-4-boronic acid is primarily used as a versatile building block in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This reaction is widely employed in the pharmaceutical industry to create complex molecules, including drug candidates, by forming carbon-carbon bonds. Its boronic acid group makes it highly reactive with various aryl or vinyl halides, enabling the synthesis of biologically active compounds. Additionally, it is utilized in the development of agrochemicals and materials science, where its structural properties contribute to the creation of novel polymers and functional materials. Its stability and reactivity also make it a valuable intermediate in the synthesis of heterocyclic compounds, which are essential in medicinal chemistry.