Used as a key intermediate in Suzuki-Miyaura cross-coupling reactions, enabling the formation of carbon-carbon bonds in pharmaceutical synthesis. Its esterified structure enhances stability and handling compared to the free boronic acid, making it suitable for solid-phase synthesis and controlled coupling processes. Commonly employed in the preparation of conjugated aromatic systems, including drug candidates and functional materials. The 1,3-propanediol ester acts as a protecting group, improving solubility and reducing protodeboronation side reactions during coupling. Particularly valuable in the development of active pharmaceutical ingredients (APIs) where reliable and efficient coupling is required under mild conditions.