N-Me-N-bis-PEG4

This PROTAC linker, N-Me-N-bis-PEG4, is designed to provide a flexible, hydrophilic connection between a ligand-binding warhead and an E3-recruiting module. Its PEG-rich architecture supports favorable solubility and conformational adaptability, which can improve productive ternary complex formation in targeted protein degradation workflows. The detailed Structure and Reactivity parameters are provided below to support experimental design and synthesis planning.

Structure: N-Me-N-bis-PEG4 is a PEG-based linker featuring multiple ether linkages within repeating poly(ethylene glycol) segments. A tertiary amine center connects the PEG arms, enabling a polar, water-compatible scaffold. The molecule’s ether-rich backbone promotes flexibility and reduces aggregation, supporting stable handling in aqueous or mixed solvents.

Reactivity: For PROTAC assembly, this linker is typically used as a functionalized PEG scaffold that can be coupled to ligands via standard amide-forming or nucleophile–electrophile coupling strategies, depending on the complementary reactive groups on the partner molecules. Reaction conditions are commonly selected to preserve PEG integrity and avoid amine side reactions, using inert atmospheres when needed, polar aprotic solvents for solubility, and base and coupling reagents appropriate to the chosen bond formation mechanism.