(1R,2S)-1-amino-2-vinylcyclopropanecarboxylic acid ethyl ester tosylate salt is primarily used in the field of organic synthesis and medicinal chemistry. It serves as a key intermediate in the preparation of various biologically active compounds, particularly in the development of pharmaceuticals. The compound's unique cyclopropane ring structure and functional groups make it valuable for constructing complex molecules with potential therapeutic applications. It is often employed in the synthesis of enzyme inhibitors, receptor modulators, and other small molecules targeting specific biological pathways. Additionally, its chiral nature allows for the creation of enantiomerically pure compounds, which is crucial in drug development to ensure efficacy and reduce side effects.