Used as a key reagent in organic synthesis, particularly in the preparation of phosphonate-based compounds for pharmaceuticals and agrochemicals. It serves as a building block in the synthesis of bioactive molecules due to its ability to participate in Horner-Wadsworth-Emmons olefination reactions, enabling the formation of carbon-carbon double bonds with high selectivity. Its allylic structure makes it valuable for introducing allyl-functionalized phosphonate groups, which are useful in the development of enzyme inhibitors and specialty polymers. Also employed in research for modifying nucleotides and creating analogs in medicinal chemistry.