(2S,4R) -Fmoc-L-Pro (4-N3) -OH

(2S,4R) -Fmoc-L-Pro (4-N3) -OH is a click chemistry reagent containing an azide[1]. (2S,4R) -Fmoc-L-Pro (4-N3) -OH is a click chemistry reagent, it contains an Azide group and can undergo copper-catalyzed azide-alkyne cycloaddition reaction (CuAAc) with molecules containing Alkyne groups. It can also undergo strain-promoted alkyne-azide cycloaddition (SPAAC) reactions with molecules containing DBCO or BCN groups.