(2-Ethynylphenyl)boronic 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. The compound's boronic acid group acts as a key intermediate, enabling the coupling of aryl or vinyl halides with aryl boronic acids to create complex organic molecules. Additionally, its ethynyl group offers further reactivity, allowing for modifications or functionalization in targeted chemical processes. It is also employed in the development of sensors and molecular probes due to its ability to interact selectively with specific analytes. Its versatility makes it a crucial component in research and industrial applications.