Used as a key intermediate in the synthesis of fluorinated pharmaceuticals and agrochemicals due to the presence of the reactive fluorosulfonyl group. The ethynyl moiety enables click chemistry applications, particularly in coupling reactions for building complex organic frameworks. Commonly employed in the development of sulfonyl-containing bioactive molecules and radiotracers for PET imaging, thanks to its ability to undergo selective transformations under mild conditions. Also utilized in materials science for designing functionalized polymers with enhanced thermal and chemical stability.