Bis-acrylate-PEG6

Bis-acrylate-PEG6 is a bifunctional polyethylene glycol linker designed for constructing PROTACs and related targeted protein degradation conjugates. Its dual acrylate termini enable efficient, chemoselective coupling to complementary nucleophilic partners, supporting modular assembly of degrader architectures with controlled linker length and flexibility. The resulting products can be tuned for optimal spatial presentation of warhead and E3 ligase-binding elements. Detailed structural and reactivity considerations are provided below.

Structure: Bis-acrylate-PEG6 is a PEG-based linker bearing two acrylate ester groups at the termini. The scaffold contains ether linkages typical of polyethylene glycol, providing conformational flexibility. The acrylates feature activated vinyl groups capable of undergoing Michael-type additions or related nucleophilic reactions, while the ester functionality supports stable conjugation.

Reactivity: The acrylate groups are suitable for nucleophilic addition reactions commonly used in PROTAC linker chemistry, including thiol- or amine-mediated conjugation via Michael addition to the activated alkene. For PROTAC synthesis, reactions are typically performed under mild, anhydrous conditions to preserve acrylate integrity, using appropriate bases or catalysts when required to promote nucleophile formation. Solvent selection often prioritizes compatibility with both acrylates and the nucleophilic coupling partner, while minimizing side reactions such as hydrolysis.