Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of kinase inhibitors for cancer treatment. Its phosphine oxide group enhances binding selectivity to certain enzyme active sites, improving drug efficacy. Also employed in agrochemicals as a building block for novel pesticides due to its stability and reactivity in cross-coupling reactions. Serves as a ligand precursor in catalysis, especially in palladium-catalyzed transformations, supporting efficient carbon-heteroatom bond formation in fine chemical manufacturing.