Azido-PEG3-Sulfone-PEG4-acid is a PEG linker containing one azide group with a terminal carboxylic acid. The terminal carboxylic acid can react with primary amine groups in the presence of activators (e.g. EDC, or HATU) forming a stable amide bond. The azide group enables Click Chemistry. The hydrophilic PEG spacer increases solubility in aqueous media.
Azido-PEG3-Sulfone-PEG4-acid is a PEG-based PROTAC linker that can be used in the synthesis of PROTACs[1]. Azido-PEG3-Sulfone-PEG4-acid 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.
