DAPOA DCHA, a compound containing azide groups, serves as a pivotal chemical reagent. It is utilized in peptide synthesis as a linker and can be further modified via the Staudinger ligation or click chemistry on azide groups. This compound acts as a building block for dendritic structures. It engages in copper-catalyzed azide-alkyne cycloaddition reactions (CuAAc) with molecules containing alkyne groups and undergoes strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules bearing DBCO or BCN groups.