Widely used in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions, this compound serves as a key boronic ester precursor. Its primary application lies in the construction of biaryl and aryl-heteroaryl frameworks, which are common structural motifs in pharmaceuticals, agrochemicals, and functional materials. The presence of the isoindoline-1,3-dione group enhances stability and can act as a protecting group or directing handle in multi-step syntheses. It is especially valuable in drug discovery and development for enabling efficient carbon-carbon bond formation under mild conditions.