tert-Butyl (4-chloro-3-hydroxyphenyl)carbamate is a Boc-protected derivative of 4-chloro-3-hydroxyaniline, serving as a key intermediate in organic synthesis. It functions as an amine protecting group (Boc group) to prevent unwanted side reactions during multi-step syntheses, enabling precise control over reaction direction. The Boc group can be readily removed under mild acidic conditions, making it ideal for complex syntheses requiring high specificity, particularly for phenolic or aniline derivative structures. It is used in the synthesis of pharmaceutical compounds, especially drugs targeting central nervous system disorders, allowing selective modification for structure-activity relationship studies. Commonly employed in preparing beta-adrenergic receptor ligands and serotonin modulators. Additionally, it finds application in agrochemical production due to its stability and reactivity in coupling reactions.