Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of active pharmaceutical ingredients (APIs) where protected amino aldehyde functionalities are required. Its aldehyde group enables coupling reactions such as reductive amination, while the Boc-protected methylamino group ensures stability and selectivity during multi-step syntheses. Commonly employed in the preparation of complex molecules including protease inhibitors, kinase inhibitors, and other bioactive compounds. Its structure allows for selective deprotection and further functionalization, making it valuable in medicinal chemistry and drug discovery.