Used as a protecting group in organic synthesis, particularly for amines and amino acids, due to its ability to selectively react with primary amines. It is widely employed in peptide chemistry to prevent unwanted side reactions during multi-step syntheses. Its bulky tert-butyl group enhances steric hindrance, improving selectivity. Also utilized in the preparation of functionalized polymers and as a building block in medicinal chemistry for designing bioactive molecules. Common in research settings for modifying proteins and studying molecular interactions.