tert-Butyloxycarbonyl-amino-polyethylene glycol-propionic acid (Boc-NH-PEGn-COOH) is a functionalized PEG linker featuring a protected amino group (Boc-protected) and a reactive carboxylic acid end. This product series is available in PEG chain lengths ranging from 1 to 12 units, serving as a key molecular tool in bioconjugation and drug development.
II. Structural Features
Amino end: Boc-protected primary amine, which can be deprotected under mild acidic conditions to release a reactive amino group
Middle chain: Polyethylene glycol (PEG) spacer arm with tunable length
Carboxylic acid end: Reactive carboxyl group capable of forming amide bonds with amines
III. Key Application Areas
1. PROTAC Technology (Proteolysis-Targeting Chimeras)
Linker Function
In PROTAC design, Boc-NH-PEGn-COOH serves as a critical linker with the following roles:
Spatial modulation: The flexible PEG chain optimizes the spatial orientation between the E3 ligase ligand and the target protein ligand
Solubility enhancement: The hydrophilic PEG chain improves the aqueous solubility and bioavailability of PROTAC molecules
Modular synthesis: The Boc protecting group allows selective deprotection and subsequent functionalization
Length optimization: Different PEG lengths (n = 1–12) enable screening for optimal linker length to maximize degradation efficiency
Application Advantages
Enhanced degradation activity: Optimizing linker length can significantly improve target protein degradation efficiency
Improved pharmacokinetics: PEGylation increases solubility and reduces non-specific binding
Reduced molecular rigidity: The flexible PEG chain lowers conformational constraints, facilitating ternary complex formation
2. Bioconjugation Chemistry
Antibody-Drug Conjugates (ADCs): Linking antibodies to cytotoxic drugs
Peptide and protein modification: Introducing functional groups or reporter molecules
Surface functionalization: Modifying nanoparticles and material surfaces
3. Drug Delivery Systems
Prodrug design: Enabling controlled release via cleavable linkers
Nanocarrier functionalization: Enhancing targeting and biocompatibility
4. Materials Science
Hydrogel synthesis: Serving as a crosslinker or functional monomer
Surface modification: Improving the hydrophilicity and biocompatibility of biomaterials
Various Kingds And Grades Of Such Monodispersed Are Readily Avaliable| SINOPEG
