(2R,4S)-Fmoc-D-Pro(4-N3)-OH
(2R,4S)-Fmoc-D-Pro(4-N3)-OH is a click chemistry reagent containing an azide group. 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.