Used as a key intermediate in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions for the construction of complex aromatic and heteroaromatic systems. Its boronate ester group enables efficient carbon-carbon bond formation, making it valuable in the development of organic electronic materials such as OLEDs, organic semiconductors, and hole-transport materials. The carbazole core provides good thermal and oxidative stability, along with favorable electronic properties, which are beneficial in optoelectronic applications. Commonly employed in the synthesis of conjugated polymers and small molecules for use in organic light-emitting diodes and photovoltaic devices.