Bzl-L-Phe-OMe*HCl

Bzl-L-Phe-OMe*HCl is an L-phenylalanine methyl ester hydrochloride bearing a benzyl (Bzl) protecting group on the amino functionality, yielding a chiral amino acid ester with a stereogenic center at the α-carbon. The structure combines an N-protected amine (benzyl carbamate-like protection depending on salt form), a methyl ester at the carboxyl terminus, and a free aromatic phenyl side chain that can participate in hydrophobic and π-stacking interactions during peptide assembly or molecular recognition studies. The hydrochloride salt form improves handling of the amino ester and can influence coupling behavior by ensuring defined protonation during peptide chemistry. The protected amino acid ester format supports standard peptide coupling workflows and downstream transformations such as ester hydrolysis, benzyl deprotection, and conversion to amide-linked intermediates for synthetic and biochemical research.

1. Peptide Synthesis

Bzl-L-Phe-OMe*HCl is used in peptide building block preparation where amino acid ester and N-protection are required for controlled peptide coupling. The benzyl-protected amino functionality and the methyl ester provide orthogonal handles for stepwise synthesis, enabling formation of amide bonds while allowing later selective deprotection and carboxyl activation. The L-configuration at the α-carbon supports stereochemically defined peptide backbones, which is essential for reproducible conformational behavior in short peptides and peptidomimetics. The resulting phenylalanine-containing intermediates can be carried forward into protected peptide fragments and then converted into longer sequences after ester hydrolysis and coupling.

2. Protected Amino Acids

Bzl-L-Phe-OMe*HCl is suitable for protected amino acid chemistry as a chiral amino acid ester intermediate that can be processed into multiple downstream derivatives. The methyl ester can be transformed into carboxylic acid or activated carboxyl derivatives for amide formation, while the benzyl protection strategy can be removed under hydrogenolysis-compatible conditions to regenerate an N-unprotected amine for subsequent coupling steps. The hydrochloride salt form supports handling and can stabilize the amino ester during storage and reagent addition, which is relevant to fine chemical synthesis and peptide manufacturing workflows. The compound's defined stereochemistry and functional group pattern make it compatible with iterative protection/deprotection cycles used in peptide synthesis and amino acid derivatization.

3. Chiral Synthesis Intermediate

Bzl-L-Phe-OMe*HCl serves as a chiral amino acid intermediate for stereocontrolled construction of phenylalanine-based fragments in asymmetric and process-oriented organic synthesis. The α-stereocenter and protected functional groups enable downstream conversion into chiral amide, carbamate, or substituted carboxyl derivatives without racemization under appropriately chosen conditions. The phenyl side chain can be retained to maintain aromatic recognition elements in SAR studies or fragment libraries, while the ester and N-protection provide adjustable reactivity for sequential transformations. The compound can be employed to generate chiral building blocks for peptide analog synthesis, chiral ligands, and stereodefined molecular scaffolds used in medicinal chemistry research.

4. Peptidomimetics And SAR

Bzl-L-Phe-OMe*HCl supports peptidomimetic construction by providing a stereochemically defined phenylalanine unit that can be incorporated into non-natural peptide analogs and structure-activity relationship (SAR) probes. The aromatic side chain contributes to hydrophobic contacts and conformational preferences, while the protected amine and ester enable attachment to scaffold-forming chemistries that mimic peptide bond connectivity. The ability to convert the methyl ester into activated acids or to deprotect the benzyl-protected nitrogen allows systematic generation of analog series with controlled N-terminus and C-terminus functionality. The resulting phenylalanine-containing intermediates can be used to build libraries of analogs for SAR studies that rely on consistent stereochemistry and functional group positioning.

5. Pharmaceutical Intermediate Preparation

Bzl-L-Phe-OMe*HCl is applicable to pharmaceutical intermediate preparation where protected amino acid esters are used to assemble peptide-like fragments and to standardize synthetic routes. The combination of N-protection and esterification provides a manageable intermediate for controlled coupling chemistry, enabling manufacturing-scale synthesis of phenylalanine-derived amide linkages and protected peptide segments. The hydrochloride salt form can support reproducible material handling and defined protonation state during process steps that involve activation or coupling reagents. Downstream conversion to carboxylic acid derivatives and benzyl deprotection can feed into further intermediate formation for API-related synthesis, including fragment condensation and protected scaffold elaboration.

6. Analytical Standards And Labeling

Bzl-L-Phe-OMe*HCl can be employed in analytical research as a reference material precursor for phenylalanine-containing standards and method development involving peptide or amino acid derivatives. The protected amino acid ester format allows preparation of defined peptide-like analytes after coupling and subsequent deprotection, supporting LC-MS or chromatographic calibration strategies for complex matrices. The stereochemical integrity of the L-configuration helps ensure that analytical signals correspond to the intended chiral species rather than racemic mixtures. The compound's functional group pattern also supports incorporation into derivatization workflows that generate measurable, structurally consistent standards for monitoring amino acid ester hydrolysis, deprotection progress, and peptide coupling outcomes.

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