n-Pentylboronic acid is primarily used in organic synthesis as a key reagent in Suzuki-Miyaura cross-coupling reactions. This reaction is widely employed to form carbon-carbon bonds, making it valuable in the production of pharmaceuticals, agrochemicals, and advanced materials. The compound acts as a coupling partner with aryl or vinyl halides, enabling the synthesis of complex organic molecules. Its application is particularly significant in the development of drug candidates, where it helps introduce pentyl groups into molecular structures. Additionally, it is utilized in the preparation of boron-containing compounds for research and industrial purposes, contributing to advancements in catalysis and material science.