Widely used in peptide synthesis as a protected tyrosine derivative. The tert-butyloxycarbonyl (Boc) group shields the amino functionality, allowing selective reactions at other sites in the molecule. This compound is especially valuable in solid-phase peptide synthesis and solution-phase coupling reactions where controlled deprotection and chain elongation are required. Its stability under basic conditions and clean removal under acidic conditions make it ideal for multi-step syntheses. Commonly employed in the production of pharmaceutical intermediates, diagnostic peptides, and research reagents.