Boc-3-Hydroxy-4-aminophenylbutyric acid is a Boc-protected aromatic amino acid derivative featuring a phenylbutyric acid backbone bearing a free primary amino group on the side chain and a hydroxyl substituent at the 3-position relative to the carboxyl group. The molecule contains a carboxylic acid functional group and an unprotected amine, while the α-amino functionality is masked as a tert-butoxycarbonyl (Boc) carbamate to control chemoselectivity during stepwise coupling chemistry and to suppress undesired reactions of the amino functionality. In synthetic peptide chemistry and related amide-forming routes, this protected amino acid is used as a precursor that introduces a hydroxyl-bearing aromatic side chain for structure-activity studies, conjugation handle placement, or the preparation of more complex amino acid and peptide derivatives.
CAT No: CP17302
Boc-3-Hydroxy-4-aminophenylbutyric acid is a Boc-protected amino acid building block featuring a phenylbutyric acid backbone and a side-chain hydroxyl group, along with a free primary amine that can be used for downstream functionalization or orthogonal coupling strategies. Its protected amino functionality makes it well suited for controlled incorporation into peptide-like constructs and for preparing complex pharmaceutical intermediates where chemoselective handling of the additional amino and hydroxyl groups is required.
1. Peptide-Like Building Block
Boc-3-Hydroxy-4-aminophenylbutyric acid is used by peptide chemistry groups to assemble peptide-like scaffolds and constrained side-chain analogs where a phenyl-substituted amino acid with a pendant hydroxyl is required. The Boc protection enables reliable handling during stepwise coupling workflows, while the additional side-chain amine supports further derivatization after assembly, allowing researchers to tune properties such as polarity and branching of functional groups in the final sequence or conjugate.
2. Pharmaceutical Intermediate Synthesis
Boc-3-Hydroxy-4-aminophenylbutyric acid serves as a practical intermediate for medicinal chemistry programs that require a phenylbutyric acid motif bearing both an alcohol and an amino handle. Process and synthesis teams commonly leverage the Boc-protected amino group to manage reactivity during multistep routes, then use the side-chain amine and hydroxyl for subsequent transformations that lead to amide/urea formation, salt formation, or other functional group elaboration typical of small-molecule lead optimization and analog production.
3. Side-Chain Functionalization Platforms
Boc-3-Hydroxy-4-aminophenylbutyric acid is frequently selected for constructing derivatization-ready intermediates where the presence of both a primary amine and a hydroxyl group enables orthogonal or sequential functionalization. Chemical biology and materials-focused synthesis teams use it to generate custom amino acid derivatives that can be further coupled to linkers, installed into larger frameworks, or converted into functional handles for downstream conjugation chemistry, while the Boc group provides a convenient level of protection during early-stage modification steps.
4. Synthesis of Amino Acid Analog Libraries
Boc-3-Hydroxy-4-aminophenylbutyric acid supports parallel synthesis and SAR-oriented library development for non-standard amino acid analogs that incorporate a phenylbutyric core with a hydroxyl-bearing side chain. Medicinal chemistry and process development groups use it to generate series of analogs with different N-substituted or O-functionalized variants derived from the side-chain amine and hydroxyl, while the Boc protection helps maintain reproducible reactivity control across library members during automated or high-throughput intermediate preparation.
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