Bz-D-Ala-OH

Bz-D-Ala-OH is the benzyl-protected, stereochemically defined D-alanine derivative in which the amino group is acylated as a benzoyl (Bz) amide while the carboxylic acid remains unprotected as a free acid. The D-configuration at the α-carbon provides a chiral, peptide-compatible building block that resists racemization under typical coupling conditions when appropriate activation and base control are used. The benzoyl amide and the free carboxyl group establish a clear reactivity profile: the acid can be activated for peptide bond formation, while the N-benzoyl group can be managed through standard amide-protection/deprotection logic during synthesis planning. As an amino acid intermediate, Bz-D-Ala-OH participates in protected amino acid strategies and can be converted into downstream derivatives for peptide construction, stereochemical studies, and process-scale fine chemical synthesis.

1. Peptide Synthesis

Bz-D-Ala-OH is used in peptide synthesis workflows where a D-alanine residue is required at a defined stereocenter. The N-benzoyl amide functions as an N-protecting group compatible with common coupling chemistries, while the free carboxylic acid enables activation to form amide bonds with amino components. The D-configuration supports incorporation into peptide chains for stereodefined analogs, including D-Ala-containing fragments used to probe backbone recognition and stability. Resulting peptide products, including short sequences and fragment building blocks, can be carried into iterative assembly and subsequent deprotection steps consistent with protected amino acid chemistry.

2. Chiral Building Block Development

Bz-D-Ala-OH serves as a chiral amino acid intermediate for stereoselective synthesis and chiral scaffold assembly. The fixed D-stereochemistry at the α-carbon provides a controllable stereochemical element that can be retained through carboxyl activation and amide formation, supporting downstream construction of dipeptides, peptidomimetics, and stereochemically labeled intermediates. The benzoyl amide offers a stable handle for chemoselective transformations, allowing synthetic routes to manage N-protection while the carboxyl functionality is converted into activated derivatives when needed. The resulting D-configured products are suitable for structure-activity relationship studies and for generating stereodefined reference materials in synthetic organic chemistry.

3. Chemical Biology Research

Bz-D-Ala-OH can be applied in chemical biology research requiring D-amino acid incorporation to modulate peptide conformation, proteolytic stability, and molecular recognition. The N-benzoyl group and free carboxylic acid allow construction of D-Ala-containing peptide analogs that can be used as substrates, inhibitors, or binding probes in enzyme and receptor-focused assays without changing the backbone stereochemical identity. The amide linkage chemistry supports further derivatization into labeled or functionalized peptide constructs, enabling downstream conjugation strategies when additional reactive handles are introduced elsewhere in the molecule. Amino acid chemistry compatibility supports a consistent synthetic logic from protected amino acid intermediate to functional biomolecular probe.

4. Pharmaceutical Intermediate Preparation

Bz-D-Ala-OH is suitable for pharmaceutical intermediate preparation where stereochemically defined D-alanine units are incorporated into peptide-like intermediates and peptidomimetic precursors. The free carboxylic acid can be transformed into activated species for controlled coupling, while the benzoyl amide provides an N-protection strategy that can be aligned with manufacturing route design and purification constraints. The chiral amino acid framework supports generation of stereodefined building blocks used in process chemistry intermediate chains, including protected dipeptide formation and subsequent functional group adjustments. Downstream derivatives can feed into larger synthetic sequences that require reliable stereochemical retention and predictable amide chemistry.

5. Fine Chemical Synthesis

Bz-D-Ala-OH functions as a practical fine chemical synthesis intermediate for producing protected amino acid derivatives and D-amino acid-containing fragments. The benzoyl-protected amide and free acid combination enables stepwise conversion into coupling-ready forms while maintaining chemoselective control over N- versus C-functionalization. The compound can be employed to prepare dipeptide building blocks, N-protected amino acid esters or activated acids, and other downstream intermediates used in specialty chemical production. The resulting materials support reproducible synthetic planning for stereodefined amino acid chemistry and scalable intermediate generation.

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