Fmoc-O-methyl-L-homoserine is an Fmoc-protected amino acid derivative based on L-homoserine, featuring a side chain that contains a hydroxyl-bearing carbon chain consistent with the homoserine scaffold. The molecule bears an Fmoc carbamate protecting group on the amino functionality and an O-methyl ether on the side-chain hydroxyl, leaving the carboxyl group available as the free acid for coupling chemistry while maintaining the L stereochemical designation stated in the name. In peptide synthesis workflows, this protected analogue functions as a stepwise building block for introducing an O-methylated homoserine residue into peptides, supporting chemoselective assembly by masking the amine and side-chain hydroxyl during chain elongation.
CAT No: CP06607
Fmoc-O-methyl-L-homoserine is an Fmoc-protected, side-chain functionalized amino acid derivative corresponding to L-homoserine with the hydroxyl group converted to an O-methyl ether. The molecule contains an Fmoc carbamate on the amino functionality, a stereogenic center at the α-carbon, and a protected side-chain oxygen that modulates hydrogen-bonding and reactivity compared with the free alcohol. The combination of an activated carbamate for peptide coupling compatibility and an ether-stabilized side chain supports controlled derivatization while maintaining orthogonality to common peptide protecting-group strategies. As an amino acid ester/ether building block analog, it can serve as a chiral intermediate for downstream functionalization of the homoserine side chain and for incorporation into peptide-like structures under Fmoc/tBu solid-phase or solution-phase workflows.
1. Peptide Synthesis
Fmoc-O-methyl-L-homoserine is used in peptide building block preparation where Fmoc protection enables standard N-activation chemistry for amide bond formation. The α-amino Fmoc carbamate and the L-configuration at the stereocenter support stereochemically defined incorporation into growing peptide chains, while the O-methyl ether on the side chain provides a protected hydroxyl handle that can be retained during coupling steps. The side-chain ether can be selectively transformed later through demethylation or functional group interconversion, enabling staged side-chain elaboration after peptide assembly. Incorporation into peptides and peptide fragments supports structure-defined homoserine-derived motifs for synthetic organic chemistry and peptide science.
2. Side-Chain Functionalization
Fmoc-O-methyl-L-homoserine is applied to amino acid modification strategies that require a protected alcohol equivalent on the homoserine side chain. The O-methyl ether reduces undesired side reactions during peptide coupling and allows controlled downstream conversion to hydroxyl-bearing or further functional derivatives through orthogonal deprotection or oxidation/reduction sequences. The presence of the Fmoc group allows N-deprotection and peptide fragment release without directly perturbing the side-chain ether under typical orthogonal conditions, supporting modular synthesis planning. The resulting intermediates can be used to generate side-chain substituted amino acid derivatives, enabling fine-tuning of polarity, solubility, and reactivity in subsequent synthetic steps.
3. Chemical Biology Probes
Fmoc-O-methyl-L-homoserine is suitable for chemical biology research requiring incorporation of homoserine-derived stereochemical elements into labeled or reactive biomolecular scaffolds. The protected amino functionality supports controlled conjugation workflows where N-deprotection or peptide fragment handling can be synchronized with labeling chemistry, while the ether-protected side chain can be converted to an alcohol-bearing functionality for attachment of linkers, tags, or affinity handles. The L-stereocenter provides defined spatial orientation that can influence molecular recognition in biomolecule-binding assays and probe design. Downstream derivatives prepared from this chiral intermediate can serve as building blocks for probe libraries, enabling systematic exploration of side-chain effects on binding and reactivity.
4. Peptidomimetics And SAR Studies
Fmoc-O-methyl-L-homoserine is employed in peptidomimetic construction and structure-activity relationship studies where homoserine-derived stereochemistry and oxygen functionality are used to tune conformational and interaction profiles. The Fmoc-protected amino group supports incorporation into constrained peptide analogs, while the O-methyl ether can act as a modifiable oxygen substituent to adjust hydrogen-bonding capacity and metabolic stability proxies in synthetic analog series. The ability to later convert the ether to a hydroxyl-bearing derivative or to further functional groups supports iterative SAR-driven library synthesis. The resulting analogs can function as defined chiral fragments for mapping how side-chain oxygen substitution patterns influence binding conformations and chemical reactivity in screening campaigns.
5. Process Chemistry Intermediate
Fmoc-O-methyl-L-homoserine is relevant to process chemistry intermediate preparation for fine chemical and pharmaceutical intermediate manufacturing routes that rely on Fmoc-protected amino acid derivatives. The Fmoc carbamate provides a robust, isolable protecting-group strategy for controlling N-reactivity during multi-step synthesis, while the O-methyl ether stabilizes the side-chain oxygen against premature esterification or undesired coupling. The defined L-stereochemistry supports batch consistency for downstream peptide building block usage, and the protected functional groups enable predictable deprotection and conversion steps during manufacturing. The compound can be applied as a chiral intermediate for producing protected homoserine derivatives, peptide fragments, and side-chain-functionalized amino acid analogs used in industrial peptide and specialty chemical synthesis.
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