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Bis-propargyl-PEG3 is a crosslinker with alkyne groups at both ends of the molecule. The alkyne groups react with azide-bearing compounds or biomolecules via copper catalyzed Click Chemistry to form a stable triazole linkage.

Bis-propargyl-PEG2 is a PEG-based PROTAC linker can be used in the synthesis of PROTACs. Bis-propargyl-PEG2 is used for the synthesis of demethylvancomycin dimers[1][2]. Bis-propargyl-PEG2 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.

PEGs

[1] Shenoi RA, et al. Synthesis, characterization, and biocompatibility of biodegradable hyperbranched polyglycerols from acid-cleavable ketal group functionalized initiators. Biomacromolecules. 2012 Oct 8;13(10):3018-30. DOI:10.1021/bm300959h
[2] Jiang, et al. Design, synthesis and biological activity of novel demethylvancomycin dimers against vancomycin-resistant enterococcus faecalis. Tetrahedron, 2018: 74(27), 3527–3533.