Used as a protecting group reagent in peptide synthesis and organic chemistry, particularly for selective protection of hydrazine derivatives. Its main application lies in the synthesis of complex molecules where controlled deprotection is required, such as in the preparation of pharmaceutical intermediates and bioactive compounds. The tert-butoxycarbonyl (Boc) groups allow for stepwise deprotection under mild acidic conditions, enabling precise manipulation of functional groups in multi-step syntheses. It is especially valuable in the construction of nitrogen-containing heterocycles and in the development of protease inhibitors.