Boc-4-Amb-OH contains an amino acid core bearing a side chain substituted with a 4-amino group (4-aminobenzyl motif) and a free carboxylic acid, and it is presented as a Boc-protected amino acid derivative suitable for peptide-related chemistry. The N-terminus is protected as a tert-butoxycarbonyl (Boc) carbamate, which masks the amino functionality to control chemoselectivity during coupling and to suppress side reactions, while the side-chain aniline-like group provides an additional basic/functional handle for further derivatization or salt formation. In synthesis and chemical biology workflows, this protected analogue is used as a building block for stepwise assembly of peptides or peptide fragments via protected-amino-acid coupling strategies, and it can also serve as a precursor for preparing more complex amino acid derivatives bearing an orthogonally addressable aromatic amine.
CAT No: CP25760
CAS No:33233-67-9
Chemical Name:4-(t-Butyloxycarbonylaminomethyl)-benzoic acid
Boc-4-Amb-OH is a Boc-protected amino acid building block bearing a 4-aminobenzyl side chain, providing a protected α-amino group for controlled peptide and intermediate synthesis while retaining a primary aniline handle on the aromatic substituent. This combination supports downstream functionalization and coupling strategies where the aromatic amine is preserved for further derivatization, including attachment of solubilizing groups, linkers, or orthogonally reactive moieties. As a protected amino acid derivative, Boc-4-Amb-OH is primarily used in chemical synthesis workflows that require a stable, isolable intermediate rather than direct biological reagent use.
1. Peptide Fragment Coupling
Boc-4-Amb-OH is used as a protected amino acid building block for assembling peptide fragments in custom peptide synthesis programs, where the Boc group enables the α-amino functionality to be managed during stepwise coupling. The 4-aminobenzyl side chain is particularly valuable for preparing peptides and peptidomimetics that incorporate an aniline-bearing aromatic residue for later derivatization or for installing aromatic pharmacophore-like motifs. Research groups in peptide chemistry and medicinal chemistry commonly select this scaffold when they want a defined aromatic side chain while keeping a primary amine available for subsequent chemistry after peptide assembly.
2. Aromatic Amine Derivatization
Boc-4-Amb-OH is frequently employed as an intermediate for downstream functionalization of the 4-aminobenzyl side chain, enabling conversion of the aniline into tailored derivatives such as substituted aromatic substituents, protected aniline intermediates, or activated forms for further coupling. Medicinal chemistry and chemical biology teams use this approach to rapidly generate structure-activity relationship (SAR) libraries where the aromatic amine serves as a branching point for introducing diverse substituents. The Boc protection on the α-amino group helps maintain synthetic control during side-chain modification steps, supporting workflows that require selective chemistry on the aromatic amine rather than on the backbone.
3. Pharmaceutical Intermediate Development
Boc-4-Amb-OH is well aligned with pharmaceutical intermediate development where a protected amino acid derivative is needed to build larger, more complex scaffolds containing an aniline-functionalized aromatic motif. Process and synthesis chemists use this reagent to prepare defined intermediates for subsequent transformations that rely on the preserved primary aromatic amine as a functional handle, while the Boc group provides a stable protection strategy during upstream assembly. This use case is common in industrial and contract synthesis settings for generating consistent, isolable intermediates that can be carried forward into late-stage coupling or derivatization steps.
4. Linker-Ready Building Block
Boc-4-Amb-OH supports linker construction strategies in which the 4-aminobenzyl side chain is used to introduce attachment points for conjugation chemistry, while the Boc-protected backbone enables controlled handling during intermediate preparation. Chemical biology and biomaterials teams often rely on an aniline-containing aromatic handle to enable coupling to electrophiles or to generate further reactive derivatives used in larger construct assembly. In these workflows, Boc-4-Amb-OH functions as a structurally defined "linker-ready" amino acid precursor, helping maintain consistency of the aromatic attachment motif across a series of synthesized conjugates or materials precursors.
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