NH2-PEG2-methyl acetate

NH2-PEG2-methyl acetate, is designed for constructing PROTACs that require a flexible, hydrophilic spacer between a targeting ligand and an E3-recruiting moiety. Its ether-rich backbone supports conformational mobility and can help tune solubility and effective intramolecular positioning during ternary complex formation. The functional handle enables reliable conjugation strategies commonly used in targeted protein degradation workflows.

Structure: The linker contains an amino-terminated polyethylene glycol segment featuring repeating ether linkages, providing a flexible, water-compatible scaffold. An acetate-derived ester cap and a terminal amine enable orthogonal functionalization. Its polar, hydrogen-bonding-capable groups support favorable solvation and dispersion in typical coupling media.

Reactivity: The methyl acetate ester functionality can participate in ester-based coupling or be transformed under standard acyl-transfer or nucleophilic substitution conditions to install a desired attachment point. The terminal amine supports formation of amide or carbamate linkages via activated carboxylic acids or suitable acylating reagents. Typical PROTAC synthesis employs anhydrous polar solvents, base-mediated activation, and mild temperatures to preserve sensitive ligands while maintaining linker integrity.