Used primarily in organic synthesis as a boronic ester coupling partner in Suzuki-Miyaura cross-coupling reactions. It enables the formation of carbon-carbon bonds, particularly in the construction of biaryl or heteroaryl frameworks found in pharmaceuticals and functional materials. The presence of the isoindolinone core offers a rigid, electron-deficient structure that can influence reactivity and binding in bioactive molecules. Commonly employed in medicinal chemistry for the development of drug candidates and in materials science for designing organic electronic compounds. Its boronate ester group provides good stability and selectivity under palladium-catalyzed conditions, making it suitable for late-stage functionalization in complex molecule synthesis.