n-Butylboronic acid pinacol ester 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 synthesis of pharmaceuticals, agrochemicals, and organic materials. The compound acts as a stable and efficient boron reagent, enabling the coupling of aryl or vinyl halides with organoboron compounds. Its pinacol ester group enhances stability, making it easier to handle and store compared to other boronic acid derivatives. Additionally, it is employed in the preparation of complex molecules, including natural products and polymers, due to its compatibility with various functional groups and reaction conditions.