Boc-Ser(Ile-Fmoc)-OH is a protected serine derivative bearing a tert-butoxycarbonyl (Boc) group on the amino functionality and an Fmoc-protected side-chain substituent, with the side chain substituted by an Ile (isoleucine) residue. The molecule contains a free carboxylic acid (-COOH) and a serine-derived hydroxyl that is functionalized to carry the Ile-Fmoc motif, while the Boc carbamate and Fmoc group provide orthogonal protection to control chemoselectivity during stepwise peptide assembly. In synthesis workflows, this compound functions as a protected amino acid building block for constructing peptide intermediates where the orthogonally protected serine side chain supports sequential coupling and deprotection strategies, and it can be used in preparing labeled or structurally modified peptide segments for structure-activity and analytical studies.
Boc-Ser(Ile-Fmoc)-OH is a protected serine-derived amino acid building block in which the α-amino group is Boc-protected and the side-chain hydroxyl is functionalized with an Ile-Fmoc substituent, yielding a chiral, orthogonally protected intermediate suitable for stepwise peptide construction. The molecule contains a serine backbone with a stereogenic center at the α-carbon, a Boc carbamate that can be removed under acid conditions, and an Fmoc group that can be removed under basic conditions to reveal a reactive amine for subsequent coupling logic. The presence of a side-chain hydroxyl masked by the Ile-Fmoc functionality modulates nucleophilicity and enables controlled side-chain chemistry without premature esterification or side reactions. The combination of orthogonal protecting groups and a protected side-chain handle makes the compound a practical chiral intermediate for amino acid derivatization workflows and for downstream synthesis of functionalized peptide analogs and research-grade conjugates.
1. Orthogonal Peptide Coupling
Boc-Ser(Ile-Fmoc)-OH is applied in peptide synthesis workflows that require orthogonal protection strategies for sequential N- and side-chain functionalization. The Boc-protected α-amino group supports controlled peptide coupling after deprotection, while the Fmoc functionality provides an additional orthogonal deprotection handle that can be used to expose an amine for iterative assembly logic. The serine-derived backbone and protected side-chain functionality help manage chemoselectivity during fragment coupling, minimizing undesired hydroxyl participation. The resulting peptide building block compatibility supports construction of branched or side-chain-modified sequences used in structure-activity relationship studies and peptide library preparation.
2. Side-Chain Functionalization
Boc-Ser(Ile-Fmoc)-OH is suitable for amino acid modification and side-chain functionalization strategies where serine hydroxyl chemistry must be controlled through protecting-group design. The side-chain hydroxyl is masked by the Ile-Fmoc substituent, enabling downstream transformations that depend on selective deprotection or controlled unveiling of reactive functionality. The stereochemical integrity of the serine α-center supports stereodefined incorporation into peptide frameworks and peptidomimetic scaffolds. The protected side-chain handle can be leveraged to generate derivatives for biochemical research intermediate preparation, including functionalized analogs used to probe recognition, binding, or processing of serine-containing motifs.
3. Chemical Biology Probes
Boc-Ser(Ile-Fmoc)-OH is utilized in chemical biology research for preparing labeled or reactive peptide analogs that incorporate protected serine residues into probe scaffolds. The orthogonally protected Boc and Fmoc groups enable staged introduction of functional tags, linkers, or capture handles while maintaining compatibility with peptide coupling conditions. The protected serine side-chain functionality can be transformed into conjugation-ready motifs after selective deprotection, supporting controlled attachment to biomolecular targets such as proteins or nucleic-acid-associated systems. The chiral, protected amino acid intermediate nature supports generation of defined probe structures for molecular recognition studies and biochemical assay reagent development.
4. Process Chemistry Intermediate
Boc-Ser(Ile-Fmoc)-OH serves as a process chemistry intermediate for fine chemical synthesis routes that benefit from orthogonal protecting-group logic and predictable functional group reactivity. The Boc carbamate and Fmoc-bearing functionality allow stepwise deprotection and coupling design, supporting manufacturing-oriented planning for multi-step peptide building block preparation. The molecule's protected hydroxyl reduces uncontrolled polymerization or side reactions during handling and coupling operations, which can be relevant for scalable synthesis of protected amino acid derivatives. The defined stereochemistry and protected-group stability profile make it suitable for downstream conversion into higher-value peptide intermediates used in specialty chemical production and industrial peptide manufacturing workflows.
5. Peptidomimetic Scaffold Design
Boc-Ser(Ile-Fmoc)-OH is applied in peptidomimetic construction and molecular design programs that require serine-based stereodefined scaffolds with controlled functional-group exposure. The serine backbone provides a stereogenic center and an amino acid framework that can be incorporated into analogs via peptide coupling chemistry, while the protected side-chain functionality supports later elaboration into constrained or substituted motifs. The orthogonal Boc/Fmoc protection scheme supports iterative synthesis of analogs with defined N-terminus and side-chain substitution patterns, which can be important for SAR studies and fragment-based molecular design. The compound's structure enables preparation of functionalized peptide analog intermediates that can be further transformed into research-grade molecules for applied biochemical investigations.
2. Immune responses to homocitrulline-and citrulline-containing peptides in rheumatoid arthritis
3. Emu oil in combination with other active ingredients for treating skin imperfections
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