1-Boc-1-ethylhydrazine is primarily used in organic synthesis as a protective reagent for hydrazine derivatives. It plays a crucial role in the preparation of pharmaceuticals and agrochemicals, where it helps in the controlled release of hydrazine during chemical reactions. This compound is particularly valuable in the synthesis of heterocyclic compounds, which are essential in drug development. Additionally, it is employed in peptide chemistry to protect functional groups during multi-step synthetic processes, ensuring the stability and integrity of the target molecules. Its application extends to the development of bioactive molecules and intermediates in medicinal chemistry research.