Boc-D-Dab(Dde)-OH is a protected, non-proteinogenic amino acid derivative featuring the D-configuration of 2,3-diaminobutyric acid (Dab) with the side-chain amine incorporated into an N-(Dde) protecting group. The molecule contains an N-terminal Boc (tert-butoxycarbonyl) carbamate and a carboxylic acid functional group, while the Dde group masks one of the side-chain amino functionalities to control chemoselectivity during stepwise coupling. In peptide chemistry and solid-phase peptide synthesis workflows, this orthogonally protected amino acid is used as a building block to introduce Dab residues with controlled reactivity of the protected versus deprotected amines for subsequent conjugation or further peptide elaboration.
CAT No: CP25263
CAS No:1263046-41-8
Synonyms/Alias:N-alpha-Boc-N-gamma-Dde-D-2,4-diaminobutyric acid;Boc-D-Dab(Dde)
Chemical Name:N-alpha-t-Butyloxycarbonyl-N-gamma-[1-(4,4-dimethyl-2,6-dioxocyclohex-1-ylidene)ethyl]-D-2,4-diaminobutyric acid
Boc-D-Dab(Dde)-OH is a protected, stereodefined amino acid building block used in peptide synthesis, featuring a Boc-protected alpha-amino group and a side-chain Dde (1-(4,4-dimethyl-2,6-dioxocyclohexylidene)ethyl) protecting group on the Dab residue. This orthogonally protected design supports sequential deprotection strategies that are commonly leveraged to assemble complex peptides and peptide segments with controlled chemoselectivity. The D-configuration and dual protection pattern make it particularly useful when incorporating a stereochemically defined Dab unit into larger synthetic targets.
1. Orthogonal Peptide Segment Assembly
Boc-D-Dab(Dde)-OH is used by peptide synthesis groups to build peptide segments that require stepwise unveiling of the Dab side-chain functionality while maintaining the N-terminus protected for coupling. The Boc group provides stability under typical coupling conditions, while the Dde side-chain protection enables selective late-stage deprotection workflows that help preserve other sensitive functionalities in the growing chain. This makes the reagent a practical choice for custom peptide synthesis where chemoselective control over attachment points is needed to generate defined branching, constrained motifs, or side-chain-modified peptide architectures.
2. Complex Peptide Library Synthesis
Boc-D-Dab(Dde)-OH supports peptide library construction workflows in medicinal chemistry and chemical biology, especially when a stereochemically defined Dab residue is required across multiple analogs. The orthogonal protection pattern helps streamline parallel synthesis by allowing the same protected intermediate to be carried through iterative couplings, with side-chain activation performed at a controlled stage to enable downstream diversification. Researchers commonly select this type of protected Dab building block when they want consistent stereochemical incorporation and reliable handling of side-chain protection during high-throughput or multi-step peptide assembly.
3. Pharmaceutical Intermediate Development
Boc-D-Dab(Dde)-OH is also used as a protected intermediate in the development of peptide-based pharmaceutical candidates and related advanced intermediates, where defined stereochemistry and controlled functional group exposure are essential for downstream transformations. The Boc/Dde protection strategy aligns with industrial and contract synthesis practices that favor modular assembly of peptide fragments, followed by selective unveiling of the side-chain amine for subsequent coupling, conjugation, or further derivatization steps. This reagent therefore fits into workflows that prioritize reproducible intermediate handling and predictable downstream reactivity for complex, multi-functional targets.
4. Stereocontrolled Peptidomimetic Design
Boc-D-Dab(Dde)-OH is frequently employed in peptidomimetic and backbone-modified peptide design programs where the D-stereochemistry of the Dab residue is used to tune structural presentation and synthetic outcomes. In these projects, the protected side-chain amine provided by the Dde group allows the Dab unit to be incorporated without premature side reactions, while later deprotection enables controlled installation of the desired side-chain chemistry. Chemists value this building block when they need a stereodefined cationic side-chain handle within a protected framework that supports sequential assembly and functionalization of peptidomimetic scaffolds.
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