N-Boc-1,2-phenyldiamine is widely used in organic synthesis as a protective group for amines, particularly in the preparation of pharmaceuticals and bioactive compounds. Its Boc group (tert-butoxycarbonyl) safeguards the amine functionality during reactions, allowing selective modifications to other parts of the molecule. This compound is especially valuable in peptide synthesis and the development of heterocyclic compounds, where it serves as an intermediate. Additionally, it plays a role in the synthesis of complex organic molecules, including dyes, agrochemicals, and ligands for catalysis. Its stability and ease of deprotection make it a preferred choice in multi-step synthetic processes.