Used as a reagent in organic synthesis, particularly in Wittig reactions to convert aldehydes and ketones into alkenes. It is effective for introducing vinyl pyridine functionalities, which are useful in the preparation of ligands for catalysis and in the synthesis of functionalized heterocyclic compounds. Its pyridyl group enhances solubility in polar solvents and can assist in directing metal coordination in complex molecules. Commonly applied in pharmaceutical and materials chemistry where tailored olefin formation is required.