Used in peptide synthesis as a protecting group for amino acids, specifically for the D-form of tetrahydroisoquinoline carboxylic acid (Tic). It helps in controlling the stereochemistry and preventing unwanted side reactions during the synthesis of complex peptides. Commonly applied in the development of pharmaceuticals, particularly in the creation of peptide-based drugs that require precise structural configurations. Its role is crucial in ensuring the stability and integrity of the peptide chain during the synthesis process.