Boc-Aib-OSu contains the Aib (α-aminoisobutyric acid) residue in a Boc-protected form, coupled to an N-hydroxysuccinimide ester (OSu) at the carboxylate position, making it an amino acid derivative designed for peptide coupling chemistry. The molecule bears a Boc carbamate on the amino group and an activated ester functionality on the carboxyl group, with the Aib side chain characterized by a sterically constrained, gem-dimethyl substituent that can influence conformational preferences during incorporation into peptides. Boc-Aib-OSu is used as a precursor for forming amide bonds in peptide synthesis and related bioconjugation workflows, where the OSu ester provides a leaving group for reaction with amine nucleophiles under conditions compatible with Boc-protected amino acid building blocks.
Boc-Aib-OSu is a Boc-protected amino acid derivative built on Aib (α-aminoisobutyric acid), featuring an activated N-hydroxysuccinimide ester (OSu) at the carboxylate position. This combination of a protected amino group and an OSu-activated ester makes the reagent well suited for controlled amide bond formation in peptide and peptidomimetic assembly, where Aib's sterically constrained side chain is frequently used to promote conformational effects. Researchers and process developers commonly select Boc-Aib-OSu when they need a reliable, isolable coupling intermediate compatible with peptide intermediate workflows.
1. Peptidomimetic Coupling
Boc-Aib-OSu is used as an activated coupling intermediate for introducing Aib-containing segments into peptidomimetic scaffolds and short peptide analogs. Medicinal chemistry and chemical biology groups rely on the OSu ester to drive efficient formation of new amide bonds with amine-bearing partners under standard peptide-intermediate conditions, while the Boc group provides protection of the amino functionality during assembly. This reagent is particularly relevant when Aib incorporation is used to influence backbone conformation in structure-activity relationship studies, and when a discrete, pre-activated building block better fits batch synthesis and purification planning than generating activation in situ.
2. Solid-Phase Peptide Building
Boc-Aib-OSu is frequently employed in workflows that require off-resin or pre-assembled Aib-containing units prior to their incorporation into a solid-phase peptide synthesis (SPPS) sequence. Peptide synthesis groups use the OSu activation to couple Aib to an appropriately protected amine partner, generating a defined intermediate that can then be carried forward into the next synthetic step with minimal ambiguity about coupling stoichiometry. The Boc protection pattern also supports downstream handling during segment condensation strategies, where maintaining amino protection until the intended deprotection/coupling stage is important for controlling chemoselectivity and preventing side reactions.
3. Pharmaceutical Intermediate Development
Boc-Aib-OSu is used in the development of peptide-based pharmaceutical intermediates and specialty building blocks where Aib-containing motifs must be prepared reproducibly at scale. Process chemistry and custom synthesis teams value the OSu ester as a stable, isolable activation form that can be integrated into convergent manufacturing routes for peptide fragments, enabling consistent intermediate quality and simplifying documentation for multi-step assembly. The Boc-protected amino functionality helps maintain orthogonality across sequential steps, supporting the preparation of well-defined amide-linked intermediates that can be further elaborated toward larger peptide constructs or constrained peptidomimetic structures.
4. Amide-Linker Synthesis
Boc-Aib-OSu is also applied to the synthesis of Aib-containing amide linkers and functionalized intermediates used in downstream conjugation or material-chemistry programs. Chemical biology and biomaterials research teams often require Aib-derived amide motifs as conformationally constrained spacers or as components of larger constructs, and the OSu activation provides a practical route to couple the activated carboxylate to primary amines. By using Boc-Aib-OSu as a defined activated building block, researchers can streamline the preparation of amide-linked fragments with controlled protection state, improving compatibility with subsequent deprotection, coupling, or incorporation steps in multi-component syntheses.
1. Implications of ligand-receptor binding kinetics on GLP-1R signalling
2. Store-operated Ca2+ entry sustains the fertilization Ca2+ signal in pig eggs
If you have any peptide synthesis requirement in mind, please do not hesitate to contact us at . We will endeavor to provide highly satisfying products and services.
Creative Peptides is a trusted CDMO partner specializing in high-quality peptide synthesis, conjugation, and manufacturing under strict cGMP compliance. With advanced technology platforms and a team of experienced scientists, we deliver tailored peptide solutions to support drug discovery, clinical development, and cosmetic innovation worldwide.
From custom peptide synthesis to complex peptide-drug conjugates, we provide flexible, end-to-end services designed to accelerate timelines and ensure regulatory excellence. Our commitment to quality, reliability, and innovation has made us a preferred partner across the pharmaceutical, biotechnology, and personal care industries.
Read More