tert-Butyl 2-methylaziridine-1-carboxylate is a key intermediate in organic synthesis, featuring a Boc-protected aziridine ring that provides stability and enables regioselective ring-opening reactions. It is primarily used as a chiral building block for constructing complex nitrogen-containing molecules, such as beta-amino alcohols and aziridine-derived pharmaceuticals. This compound is essential in medicinal chemistry for developing drugs targeting various therapeutic areas, including antivirals and anticancer agents. Its applications also extend to peptide synthesis, where it facilitates the incorporation of modified amino acid residues, and to materials science for creating functionalized polymers with specific biological activities.