4-Butoxyphenylboronic acid is widely used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This reaction is essential for forming carbon-carbon bonds, enabling the synthesis of complex organic molecules, including pharmaceuticals, agrochemicals, and advanced materials. Its boronic acid group acts as a key intermediate, facilitating the coupling of aryl or vinyl halides with aryl or vinyl boronic acids. Additionally, it is employed in the development of sensors and diagnostic tools due to its ability to interact with diols and sugars, making it useful in glucose sensing and other biochemical applications. Its stability and reactivity make it a valuable compound in both industrial and research settings.