Used in organic synthesis as a key intermediate for pharmaceuticals and functional materials, particularly in the development of carbazole-based compounds with optoelectronic properties. Serves as a building block in the preparation of phosphonate derivatives for use in medicinal chemistry, including potential kinase inhibitors and anticancer agents. Also applied in the synthesis of conjugated polymers for organic light-emitting diodes (OLEDs) and photovoltaic devices due to its electron-transport characteristics and structural stability.