mPEG8-alcohol

This mPEG8-alcohol linker is a polyethylene glycol–based, hydroxyl-terminated building block designed to support PROTAC assembly by enabling efficient conjugation to targeting ligands and/or E3-recruiting moieties. Its PEG-rich architecture provides hydrophilicity and conformational flexibility, which can improve solubility and reduce nonspecific interactions in biochemical workflows. The detailed Structure and Reactivity parameters are provided below for experimental planning.

Structure: The linker comprises an mPEG chain terminated with a primary alcohol, featuring repeating ether linkages along the polymer backbone. It is an amphiphilic, flexible macromolecular scaffold with an alcohol functional handle suitable for standard derivatization chemistry.

Reactivity: The terminal alcohol can be converted into activated intermediates (for example, via esterification or carbamate formation) to enable coupling to complementary functional groups on PROTAC partners. Typical approaches use mild base or coupling reagents in polar aprotic solvents, with reaction monitoring by chromatography or spectroscopy. PEG ethers generally remain stable under neutral, non-oxidizing conditions, supporting robust stepwise synthesis.