3,4-Dihydroxy-DL-Phenylalanine is a DL (racemic) aromatic amino acid derivative featuring a phenylalanine backbone bearing two adjacent hydroxyl substituents at the 3 and 4 positions of the side chain. The molecule contains both an amino group and a carboxyl group, and its catechol-like dihydroxy functionality provides hydrogen-bonding and redox-active behavior that can influence coupling, oxidation sensitivity, and analytical detection compared with unsubstituted phenylalanine. As a non-proteinogenic, structurally modified amino acid, it is used in peptide and conjugate synthesis where the catechol functionality serves as a chemical handle for structural studies, crosslinking or bioconjugation workflows, and as a substrate or reference material in analytical method development for aromatic amino acid derivatives.
CAT No: CP13603
3,4-Dihydroxy-DL-Phenylalanine is a catechol-containing phenylalanine analog available as a DL mixture, featuring two adjacent hydroxyl groups on the aromatic ring and a free amino acid functionality suitable for chemical derivatization and analytical reference work. The catechol motif provides strong metal-binding and redox-active behavior, which is frequently exploited in materials chemistry and in the preparation of defined standards for analytical characterization. As an amino acid building block, it is commonly handled as a research-grade intermediate for downstream functionalization rather than as a protein-encoded residue.
1. Catechol Materials Functionalization
3,4-Dihydroxy-DL-Phenylalanine is used by materials and surface-chemistry researchers to introduce catechol functionality into polymer, coating, and biomimetic architectures. The vicinal diol (catechol) enables robust adhesion and coordination interactions with metal ions, supporting workflows that require defined catechol density on a substrate or within a polymer network. In practice, the DL form is often selected when stereochemical uniformity is not required for the target material property, while the amino acid backbone provides a convenient handle for coupling to linkers, forming protected intermediates, or enabling further functional group installation for surface immobilization.
2. Peptidomimetic and Ligand Building Block
3,4-Dihydroxy-DL-Phenylalanine is applied in peptidomimetic and ligand design efforts where catechol-bearing side chains are used to modulate binding through metal coordination or hydrogen-bonding interactions. Chemical biology and medicinal chemistry groups incorporate this amino acid analog into short synthetic sequences or conjugation scaffolds to create defined catechol-containing motifs for structure-activity relationship studies. The amino acid framework supports straightforward downstream assembly into customized constructs, while the catechol group provides a chemically distinctive functionality that can be tuned via derivatization to generate libraries of catechol-containing intermediates for screening and characterization.
3. Analytical Standard and Derivatization Reference
3,4-Dihydroxy-DL-Phenylalanine is frequently employed as an analytical standard and derivatization reference in workflows that quantify catechol-containing species or monitor catechol conversion during chemical processing. Laboratories use the DL mixture to generate reproducible calibration behavior when stereospecific separation is not required, and the catechol motif enables targeted detection strategies after appropriate derivatization or chromatographic separation. This use is common in method development for LC-MS and related analytical platforms where defined catechol-bearing amino acid analogs are needed to validate sample preparation, recovery, and identity assignment for related compounds.
4. Pharmaceutical Intermediate Development
3,4-Dihydroxy-DL-Phenylalanine serves as a catechol-bearing amino acid intermediate in industrial and pharmaceutical intermediate development programs that require a defined aromatic diol motif as a synthetic precursor. Process development teams rely on the amino acid backbone as a convenient starting point for converting to activated derivatives, protected intermediates, or conjugation-ready forms that preserve the catechol functionality for later steps. The DL configuration is often acceptable for intermediate-stage chemistry when the downstream route does not depend on stereochemical purity, allowing efficient progression toward catechol-functionalized intermediates used in specialty chemical manufacturing and research-scale synthesis programs.
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