mPEG10-alcohol

mPEG10-alcohol is a polyethylene glycol (mPEG)–derived alcohol linker designed to support PROTAC construction by enabling controlled conjugation, solubility enhancement, and improved handling of bifunctional degradation agents. Its ether-rich, flexible scaffold can help tune physicochemical properties and facilitate attachment to ligands or reactive handles under standard bioconjugation workflows. The detailed structural and reactivity considerations are provided below to guide experimental design.

Structure: mPEG10-alcohol comprises a methoxy-capped poly(ethylene glycol) chain terminating in a primary alcohol. The molecule features repeating ether linkages that confer conformational flexibility, hydrophilicity, and chemical stability, while the terminal hydroxyl provides a reactive functional group for derivatization. These characteristics make it suitable for linker-mediated conjugation.

Reactivity: The terminal alcohol enables common PROTAC-compatible coupling strategies after conversion to activated intermediates, such as ester or carbonate derivatives, or via nucleophilic substitution routes to introduce electrophilic sites for ligand attachment. Typical conditions use polar aprotic or aqueous-compatible solvents and mild bases or coupling reagents, with reaction temperatures selected to preserve sensitive ligands. Mechanistically, formation of an activated carbonyl or leaving group allows controlled nucleophilic attack by target functional groups, yielding stable linkages suitable for bifunctional assembly.