N-Boc-N-bis(PEG4-acid)

• CAT Number: I015923
• CAS Number: 2093152-88-4
• Molecular Formula: C27H51NO14
• Molecular Weight: 613.69
• Purity: ≥95%
• Synonyms: 3-[2-[2-[2-[2-[2-[2-[2-[2-(2-carboxyethoxy)ethoxy]ethoxy]ethoxy]ethyl-[(2-methylpropan-2-yl)oxycarbonyl]amino]ethoxy]ethoxy]ethoxy]ethoxy]propanoic acid
• InChI: InChI=1S/C27H51NO14/c1-27(2,3)42-26(33)28(6-10-36-14-18-40-22-20-38-16-12-34-8-4-24(29)30)7-11-37-15-19-41-23-21-39-17-13-35-9-5-25(31)32/h4-23H2,1-3H3,(H,29,30)(H,31,32)
• InChIKey: FKLCISHEONZNFI-UHFFFAOYSA-N
• SMILES: CC(C)(C)OC(=O)N(CCOCCOCCOCCOCCC(=O)O)CCOCCOCCOCCOCCC(=O)O

N-Boc-N-bis(PEG4-acid)（Cat No.:I015923）is a bifunctional PEG derivative consisting of a Boc-protected amine core substituted with two PEG₄ chains, each terminating in a carboxylic acid. The Boc group provides protection for controlled deprotection and subsequent amine reactivity, while the terminal carboxyl groups can be readily activated to couple with amines, hydroxyls, or other nucleophiles, forming stable linkages. The PEG₄ chains impart excellent solubility, flexibility, and biocompatibility while minimizing steric hindrance. This reagent is particularly useful in bioconjugation, crosslinking, nanoparticle functionalization, and drug delivery applications requiring dual reactive carboxyl groups.