Bz-D-Phe-OH

Bz-D-Phe-OH is the benzyl ester-protected, D-configured phenylalanine acid, presented as Bz-D-Phe-OH where the amino acid backbone retains a stereogenic center at the α-carbon and the side chain is a benzyl-substituted aromatic group typical of phenylalanine. The molecule contains a carboxylic acid for C-terminal handling and a benzyl-type N-protecting group (Bz) that modulates amine reactivity during peptide coupling and subsequent deprotection. The D-configuration provides stereochemical control for generating D-amino acid-containing peptides and for probing stereochemical effects in structure-function studies. The aromatic side chain and the protected amino functionality support standard peptide chemistry transformations, while the free acid enables conversion to activated intermediates used in downstream amide bond formation.

1. Peptide Synthesis

Bz-D-Phe-OH is applied in peptide synthesis as a D-phenylalanine building block with a protected amino group and a carboxylic acid handle for controlled coupling chemistry. The benzyl-type N-protection helps suppress undesired side reactions of the amine during activation and coupling steps, while the α-carboxylic acid supports C-terminal activation to form amide bonds. D-stereochemistry at the α-carbon enables incorporation of stereodefined D-amino acid residues into peptide chains for preparing D-amino acid-enriched sequences and peptide analogs. Downstream, the compound can be used to generate protected D-Phe residues for stepwise assembly and for producing peptide fragments that require stereochemical fidelity.

2. Peptidomimetics

Bz-D-Phe-OH is used in peptidomimetic construction and molecular scaffold design where D-phenylalanine stereochemistry influences conformational preferences and resistance to proteolysis. The phenyl side chain provides a hydrophobic aromatic element that can participate in binding-site recognition, while the protected amine supports conversion into amide-linked analogs without premature nitrogen reactivity. Benzyl-type protection strategy allows sequential elaboration of the peptide-like framework, including further functionalization at the carboxyl terminus or incorporation into larger synthetic sequences. The resulting D-amino acid-containing motifs can serve as building blocks for SAR studies and for generating stereochemically defined peptidomimetic libraries.

3. Chemical Biology Studies

Bz-D-Phe-OH is suitable for chemical biology research requiring stereochemically defined amino acid derivatives for studying biomolecular recognition and enzyme selectivity. The D-configuration and phenylalanine side chain enable design of probes and inhibitors that distinguish stereochemical preferences in peptide-binding pockets and active sites. The protected amino group supports incorporation into peptide conjugates or probe scaffolds, while the carboxylic acid enables formation of activated derivatives for attachment to tags or carriers. Downstream use can include preparation of D-Phe-containing peptide conjugates used to interrogate binding interactions, processivity, or substrate specificity in biochemical assays.

4. Protected Amino Acid Chemistry

Bz-D-Phe-OH is employed as a protected amino acid intermediate in synthetic organic chemistry where N-protection and stereochemical integrity are required for reliable downstream transformations. The benzyl-type N-protection provides a controlled reactivity profile during coupling chemistry, while the free carboxylic acid enables conversion to acid derivatives for amide formation or for stepwise chain elongation. D-phenylalanine stereochemistry supports stereoselective synthesis of D-amino acid-containing products and helps prevent racemization when integrated into multi-step routes. The compound can be used to prepare additional protected derivatives or to generate activated C-terminal forms that feed into peptide building block preparation and process chemistry intermediate workflows.

5. Pharmaceutical Intermediate Preparation

Bz-D-Phe-OH is relevant to pharmaceutical intermediate preparation and fine chemical synthesis where D-amino acid residues are incorporated to modulate physicochemical properties of peptide-like candidates. The combination of aromatic phenyl side chain and protected amine supports synthesis of D-Phe-containing intermediates used in the assembly of peptide fragments and constrained analogs. The carboxylic acid functionality can be converted into activated species for controlled amide bond formation in manufacturing-scale peptide chemistry, while the N-protection strategy helps maintain compatibility with common coupling conditions. Downstream, the compound supports generation of stereodefined intermediates used in process design for peptide analog production and related specialty chemical manufacturing.

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