3-Nitrophenylboronic acid 1,3-propanediol ester is used as a key intermediate in Suzuki-Miyaura cross-coupling reactions, enabling the synthesis of complex organic molecules, particularly biaryl compounds bearing the 3-nitrophenyl moiety, in pharmaceutical and agrochemical industries. Its boronic ester structure enhances stability and handling compared to the free boronic acid, making it suitable for controlled coupling processes. Commonly employed in the preparation of functionalized aromatic systems found in active pharmaceutical ingredients (APIs). Also utilized in materials science for constructing conjugated systems in organic electronics.