Boc-beta-cyclopropyl-D-Ala-OH · DCHA is a protected, non-natural amino acid derivative in which the D-alanine backbone bears a beta-cyclopropyl substituent and the alpha-amino group is masked as a Boc carbamate. The molecule contains a free carboxylic acid functionality for coupling chemistry, while the Boc group provides chemoselectivity by suppressing undesired amine reactivity during stepwise peptide or amino acid assembly, and the DCHA component indicates formation as a salt with dicyclohexylamine to influence handling and solid-state properties. In synthesis and chemical biology workflows, this compound is used as a building block for preparing modified peptides and peptide analogues that incorporate the cyclopropyl-bearing alanine motif for structure-activity studies, conformational probing, and analytical method development.
Boc-beta-cyclopropyl-D-Ala-OH · DCHA is a Boc-protected D-alanine derivative bearing a beta-cyclopropyl substituent, supplied as a dicyclohexylamine (DCHA) salt to support handling and downstream coupling workflows. This non-proteinogenic, stereodefined amino acid building block is used in peptide and peptidomimetic synthesis where side-chain steric and conformational effects are leveraged to probe structure-activity relationships. The Boc group provides a stable N-terminal protection strategy compatible with protected-amino-acid assembly into defined peptide segments.
1. Peptidomimetic Building Block
Boc-beta-cyclopropyl-D-Ala-OH · DCHA is used by medicinal chemistry and peptide research groups to incorporate a D-configured, beta-cyclopropyl-substituted alanine unit into peptidomimetic scaffolds. The cyclopropyl side-chain offers a compact, sterically constrained motif that is frequently employed to tune local conformation and backbone/side-chain presentation in structure-activity relationship studies. Researchers commonly select this protected amino acid when they need a defined stereochemical element and a robust, Boc-protected coupling handle to build sequence-defined analogs for SAR screening and lead optimization.
2. Solid-Phase Peptide Segment Synthesis
Boc-beta-cyclopropyl-D-Ala-OH · DCHA is applied in custom peptide manufacturing and academic peptide synthesis workflows that rely on protected amino acid building blocks for segment assembly. The Boc-protected amino functionality supports routine incorporation into peptide sequences while maintaining compatibility with standard protected-amino-acid handling practices used for library-style synthesis. Peptide chemists use this derivative to generate D-amino-acid-containing segments where stereochemistry control is required for studying effects on peptide folding, proteolytic stability trends in assay systems, and overall physicochemical behavior of analog series.
3. Pharmaceutical Intermediate Development
Boc-beta-cyclopropyl-D-Ala-OH · DCHA is also used as a defined pharmaceutical intermediate for the preparation of more complex, non-natural amino-acid-containing intermediates and advanced building blocks. Process and development chemists value the salt form for practical weighing and formulation into coupling-ready solutions during route development for peptidomimetic candidates. Downstream, the Boc-protected functionality enables controlled conversion into the corresponding protected peptide or fragment precursors used in stepwise synthesis of larger drug-like molecules.
4. Analytical Reference for Non-Natural Amino Acids
Boc-beta-cyclopropyl-D-Ala-OH · DCHA serves as a characterization and method-development reference material for workflows that quantify or verify non-natural amino-acid incorporation in synthesized intermediates and peptide analogs. Analytical chemists use the stereodefined, protected building block to support LC-MS or related analytical checks of identity and composition during synthesis optimization, purification development, and stability studies of peptide-like intermediates. The presence of the defined protection and salt form helps ensure that the reference matches the chemical form encountered in typical synthetic and analytical sample preparation.
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