Propargyl-PEG3-amine is a PEG derivative containing a propargyl group and an amino group. The propargyl group can be reacted with azide-bearing compounds or biomolecules via copper-catalyzed azide-alkyne Click Chemistry to yield a stable triazole linkage.
Azido-PEG3-S-PEG4-propargyl is a polyethylene glycol (PEG)-based linker that contains the azide group and propargyl functionality. This linker is designed specifically for the synthesis of proteolysis targeting chimeras (PROTACs)[1].