(2r,4r)-fmoc-d-pro(4-n3)-oh

(2R,4R)-Fmoc-D-Pro(4-N3)-OH (cis-4-Azido-N-Fmoc-D-proline) is a click chemistry reagent that contains an azido group.

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

(2S,4R)-Fmoc-L-Pro(4-N3)-OH is a click chemistry reagent that features an azide group capable of undergoing copper-catalyzed azide-alkyne cycloaddition reactions (CuAAc) with molecules containing an alkyne group. It can also participate in strain-promoted alkyne-azide cycloaddition reactions (SPAAC) with molecules containing DBCO or BCN groups. This compound is a useful tool for bioconjugation in chemical synthesis and drug development.