4-Ethoxyphenylboronic acid is widely used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This reaction is essential for forming carbon-carbon bonds, making it valuable in the production of pharmaceuticals, agrochemicals, and advanced materials. Its role as a boronic acid derivative allows it to act as a key intermediate in the synthesis of complex organic molecules. Additionally, it is utilized in the development of sensors and molecular recognition systems due to its ability to interact with diols and other functional groups. Its applications extend to research in medicinal chemistry, where it contributes to the creation of novel drug candidates and bioactive compounds.