Used as a protecting group reagent in organic synthesis, particularly in peptide and pharmaceutical manufacturing. The tert-butyl carbamate (Boc) group stabilizes amines during reactions, preventing unwanted side reactions. The 4-methoxyphenyl variant enhances solubility and crystallinity, aiding in intermediate isolation. Commonly applied in the synthesis of complex molecules where selective deprotection and mild reaction conditions are required. Also utilized in the development of agrochemicals and active pharmaceutical ingredients (APIs) due to its stability under a range of reaction conditions and ease of removal under acidic conditions.