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. The benzaldehyde group readily reacts with primary amines, aminooxy and hydrazide. The PEG spacer increase the solubility of the resulting complex in aqueous media.
AxisPharm offers 5000+ PEG Linkers with high purity. Different kinds of PEG Reagents may be available by custom synthesis.