MS-PEG12-THP

MS-PEG12-THP is a polyethylene glycol-based PROTAC linker designed to connect a ligand for a target protein to a second binding element while providing conformational flexibility and improved solubility in typical organic and mixed aqueous systems. Its PEG architecture and reactive handle support efficient conjugation strategies used in targeted protein degradation workflows. The sections below describe the linker’s structural characteristics and practical reactivity considerations in PROTAC assembly.

Structure: The linker comprises a PEG chain featuring ether linkages that confer hydrophilicity and dynamic conformational sampling. A THP-associated functional motif provides a chemical handle for downstream coupling. Overall, the structure is flexible, with polar oxygen atoms that can influence solvation and effective intramolecular reach.

Reactivity: MS-PEG12-THP is suitable for PROTAC synthesis via linker-to-ligand conjugation reactions that use the THP-related reactive group as the coupling site. Typical approaches include nucleophilic substitution or acyl/amine-forming coupling, selected to match the complementary functional group on the partner ligand. Mild bases and common coupling solvents are often employed, with reaction progress monitored by standard analytical methods to ensure selective formation of the desired conjugate.