Used primarily as a protected amine intermediate in organic synthesis, particularly in the pharmaceutical and agrochemical industries. The Boc (tert-butoxycarbonyl) group provides stability under various reaction conditions while allowing for selective deprotection under mild acidic conditions. The tosyl (p-toluenesulfonyl) group enhances the stability of the methylene linker and can act as a good leaving group, enabling further functionalization such as alkylation or cross-coupling reactions. Commonly employed in multi-step syntheses of complex molecules, including active pharmaceutical ingredients (APIs), where controlled amine reactivity is essential. Its dual protection strategy makes it valuable in peptide chemistry and heterocycle formation.