4-Azidophenol
4-Azidophenol (p-Azidophenol) is a click chemistry reagent containing an azide group that can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. 4-Azidophenol can also react with molecules containing DBCO or BCN groups through strain-promoted azide-alkyne cycloaddition (SPAAC).