Used as a key intermediate in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions to construct 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 and organic semiconductors. Commonly employed in the preparation of host materials or emitters in light-emitting diodes due to the carbazole moiety’s excellent hole-transport and thermal stability properties. Also utilized in the synthesis of conjugated polymers and small molecules for photovoltaic devices.