Used as a highly reactive bis-electrophilic coupling reagent in organic synthesis, particularly in the formation of spirocyclic and biaryl structures through palladium-catalyzed cross-coupling reactions. Its trifluoromethylsulfonyloxy groups act as excellent leaving groups, facilitating efficient carbon–carbon bond formation under mild conditions. Commonly employed in the preparation of complex organic frameworks found in pharmaceuticals and advanced materials. Also utilized in polymer chemistry to introduce spirobiindan moieties, enhancing thermal stability and rigidity in the resulting polymers.