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Benzyl-PEG2-azide is a PEG linker with an acid labile, benzyl protecting group. The azide can participate in copper-catalyzed Click Chemistry reactions with alkynes, DBCO and BCN moieties. The hydrophilic PEG linker increases the water solubility of the compound in aqueous media.

Benzyl-PEG2-azide is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Benzyl-PEG2-azide 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.

[1] Steinebach C, et al. A MedChem toolbox for cereblon-directed PROTACs. Medchemcomm. 2019 May 28;10(6):1037-1041. DOI:10.1039/c9md00185a