2-Methoxy-L-Phenylalanine contains the amino acid backbone with an L-configuration and a benzyl side chain bearing a methoxy substituent at the 2-position, classifying it as a naturally inspired aromatic amino acid derivative. The molecule presents a free amino group and a carboxyl group suitable for zwitterionic behavior in aqueous media, while the ortho-methoxy functionality adds an ether oxygen that can influence polarity, hydrogen-bonding patterns, and conformational preferences of the aromatic side chain. As an unprotected amino acid analogue, it is used in peptide synthesis and structure-activity studies to introduce an ortho-methoxy aromatic residue that serves as a defined chemical handle for probing side-chain effects in peptide and protein analogs.
CAT No: CP15301
2-Methoxy-L-Phenylalanine is an L-amino acid bearing a methoxy-substituted phenyl side chain, making it a useful aromatic building block for structure-activity relationship studies and peptide or peptidomimetic design. The methoxy substituent provides distinct electronic and steric properties relative to unsubstituted phenylalanine, enabling medicinal chemistry teams to probe how aromatic substitution patterns influence conformation and receptor/target interactions. In research workflows, it is typically handled as a free amino acid for incorporation into synthetic sequences and for preparing analytical or reference materials.
1. Peptide And Peptidomimetic Building
2-Methoxy-L-Phenylalanine is used as a non-standard amino acid building block in custom peptide synthesis and peptidomimetic development, where aromatic ring substitution is used to tune physicochemical behavior and binding-relevant features. Medicinal chemistry groups commonly incorporate this residue into short bioactive peptide analogs and SAR libraries to evaluate how a methoxy substituent on the phenyl ring affects local interactions, conformational preferences, and overall molecular recognition. Because the side chain remains an aromatic ether rather than a reactive handle, it is particularly useful when researchers want to introduce substitution without adding additional functional-group complexity.
2. Medicinal Chemistry SAR Studies
2-Methoxy-L-Phenylalanine supports medicinal chemistry programs that require defined aromatic substitution patterns for lead optimization and chemical biology probe analogs. In practice, it is used to prepare analog series where the aromatic ring electronics and hydrogen-bonding environment are systematically varied, helping teams correlate structural changes with observed behavior in biochemical assays or binding experiments. The L-stereochemistry aligns with common peptide-like scaffold design conventions, making it a straightforward choice for researchers building analogs that preserve an amino-acid-derived backbone while varying side-chain substitution.
3. Analytical Reference Standards
2-Methoxy-L-Phenylalanine is also used to prepare analytical standards for method development and characterization of peptide or amino-acid-containing samples. Analytical chemistry laboratories employ it as a defined reference material when developing LC methods, verifying derivatization workflows, or confirming the identity and relative abundance of substituted phenylalanine residues in synthetic mixtures and biological matrices. The well-defined methoxy-substituted aromatic side chain provides a distinct mass and chromatographic signature compared with common phenylalanine derivatives, supporting robust peak assignment and calibration strategies.
4. Protein Engineering Analog Design
2-Methoxy-L-Phenylalanine is used in protein engineering and chemical protein design workflows that rely on incorporating non-canonical aromatic residues into engineered constructs or model systems. Researchers use it to generate defined analog peptides or protein fragments that mimic residue-level changes, enabling studies of how aromatic substitution influences structure, folding tendencies, or interaction surfaces in a controlled manner. This amino acid is particularly relevant when the goal is to introduce a methoxy-substituted phenyl side chain as a structural variable while maintaining an amino-acid-derived stereochemical motif for consistent interpretation across construct sets.
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