Fmoc-alpha-All-L-Ala-OH

Fmoc-alpha-All-L-Ala-OH is an Fmoc-protected, L-configuration alanine derivative bearing an allyl substituent on the alpha-amino acid framework, functioning as an amino acid building block for protected amino acid synthesis and peptide construction. The molecule contains an Fmoc carbamate on the amino functionality, a free carboxylic acid for C-terminal activation, and an allyl side chain that can participate in alkene-selective transformations while remaining compatible with standard peptide coupling conditions. The stereogenic center at the alanine backbone is defined as L, enabling predictable stereochemical outcomes in peptide bond formation and downstream stereospecific derivatization. The combination of a base-labile Fmoc protecting group and a chemically addressable allyl moiety supports orthogonal protection strategies and provides a chiral intermediate suitable for both synthetic methodology development and functional peptide analog generation.

1. Peptide Synthesis

Fmoc-alpha-All-L-Ala-OH is used in peptide synthesis workflows where an Fmoc-protected amino acid with a free carboxylic acid enables controlled N-to-C coupling during stepwise assembly. The Fmoc carbamate supports orthogonal deprotection under mild base conditions, while the allyl-bearing side chain can remain intact through coupling and deprotection cycles, allowing late-stage functionalization of the incorporated residue. The defined L-stereochemistry at the backbone helps maintain stereochemical integrity in peptide analog libraries and supports consistent conformational behavior of the resulting sequences. The resulting allyl-functional alanine residue can be further converted into diversified side-chain motifs, supporting iterative refinement of peptide scaffolds in research and process-oriented fine chemical synthesis.

2. Side-Chain Functionalization

Fmoc-alpha-All-L-Ala-OH is applied in side-chain functionalization strategies for introducing an alkene handle into peptide frameworks and other amino acid-derived scaffolds. The allyl substituent can undergo chemoselective transformations such as oxidation, metathesis, or radical-mediated modifications, enabling conversion of the incorporated residue into hydroxylated, heteroatom-substituted, or cyclized motifs while the Fmoc group is removed as needed for further chain elongation. The presence of a free carboxylic acid facilitates formation of activated derivatives for conjugation or for incorporation into larger intermediates, including protected amino acid derivatives used in multi-step syntheses. Downstream utility includes generating functional peptide analogs for chemical biology studies and producing defined intermediates for industrial fine chemical synthesis where controlled functional group installation is required.

3. Peptidomimetics And SAR

Fmoc-alpha-All-L-Ala-OH serves in peptidomimetic and structure-activity relationship (SAR) studies by providing a stereodefined alanine unit with an allyl-functional side chain that can be diversified after peptide assembly. The Fmoc-protected amine supports incorporation into peptide-based scaffolds, while the allyl group enables systematic modification to probe how side-chain electronics, sterics, and reactivity influence molecular recognition. The L-configuration at the backbone ensures that stereochemical changes are attributable to side-chain derivatization rather than backbone inversion, supporting interpretable SAR comparisons across analog series. The resulting functionalized residues can be used to construct constrained or cyclizable peptidomimetics, supporting fragment-to-lead exploration in medicinal chemistry and enabling downstream synthesis of analogs for analytical reference standards.

4. Chemical Biology Labeling

Fmoc-alpha-All-L-Ala-OH is suitable for chemical biology and biomolecule labeling workflows where an allyl-bearing amino acid residue can be incorporated into peptides or peptide-like probes for subsequent conjugation. The allyl functionality provides a reactive handle for orthogonal post-synthetic modification, enabling attachment of tags, linkers, or affinity groups without requiring direct manipulation of the backbone stereocenter. The Fmoc protection strategy allows sequential synthesis of labeled probes with controlled placement of the functional residue, and the free carboxylic acid supports conversion into coupling-ready intermediates for conjugation chemistry. Downstream applications include generating chemically defined labeling reagents and research intermediates for mapping molecular interactions using amino acid chemistry-compatible synthetic routes.

5. Pharmaceutical Intermediate Preparation

Fmoc-alpha-All-L-Ala-OH is employed as a process-compatible amino acid intermediate in pharmaceutical intermediate preparation where protected amino acid chemistry and orthogonal functional group management are required. The Fmoc carbamate enables reliable handling during multi-step synthesis, while the free carboxylic acid supports activation to form amide or ester linkages in downstream intermediate construction. The allyl substituent can serve as a controlled precursor for further functional group transformations that may be used to access constrained side-chain motifs or reactive intermediates during route design. The chiral L-alanine backbone provides stereochemical fidelity for manufacturing of defined chiral intermediates used in fine chemical synthesis and applied product development pipelines.

1. cRGD-functionalized, DOX-conjugated, and 64Cu-labeled superparamagnetic iron oxide nanoparticles for targeted anticancer drug delivery and PET/MR imaging

2. Adipose tissue is a key organ for the beneficial effects of GLP-2 metabolic function

3. C-peptide and its C-terminal fragments improve erythrocyte deformability in type 1 diabetes patients

4. Application of human liver organoids as a patient-derived primary model for HBV infection and related hepatocellular carcinoma

5. Olfactory receptor based piezoelectric biosensors for detection of alcohols related to food safety applications