Used as an intermediate in the synthesis of pharmaceuticals, particularly in the preparation of nitrogen-containing heterocycles and bioactive molecules. Its reactivity allows for the introduction of ethylamine functionalities through nucleophilic substitution or palladium-catalyzed coupling reactions. Commonly employed in medicinal chemistry for constructing peptidomimetics and kinase inhibitors. Also serves as a building block in the development of central nervous system agents due to its ability to cross blood-brain barrier when incorporated into larger structures.