H-L-Tyr (2-azidoethyl) -OH

H-L-Tyr (2-azidoethyl) -OH is a unnatural Tyrosine derivative. H-L-Tyr (2-azidoethyl) -OH is a click chemistry reagent containing an azide group[1][2]. It contains an azide group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing alkyne groups. It can also undergo ring strain-promoted alkyne-azide cycloaddition (SPAAC) with molecules containing DBCO or BCN groups.