Boc-beta-cyclopropyl-Ala-OH · DCHA is a Boc-protected, alanine-derived amino acid derivative featuring a cyclopropyl substituent at the beta position of the side chain and an amino acid backbone with a free carboxylic acid. The molecule contains a tert-butoxycarbonyl (Boc) protecting group on the amino functionality to suppress undesired amine reactivity during stepwise assembly, while the beta-cyclopropyl group provides a constrained hydrophobic/sterically defined side-chain motif; the "· DCHA" indicates it is present as a salt with dicyclohexylamine, modifying its handling and intermolecular properties relative to the free acid. This protected amino acid is employed as a precursor in peptide and peptidomimetic synthesis to introduce the beta-cyclopropyl alanine motif with controlled chemoselectivity at the amine during coupling and subsequent deprotection.
Boc-beta-cyclopropyl-Ala-OH · DCHA is a Boc-protected amino acid derivative featuring a cyclopropyl-substituted β-carbon side chain and a free carboxylic acid, supplied as a dicyclohexylamine (DCHA) salt to support handling and formulation in peptide and intermediate workflows. The Boc group provides N-terminal protection for controlled coupling chemistry, while the cyclopropyl-bearing alanine framework is frequently selected to introduce conformational and steric effects into peptide backbones for structure-activity and property tuning studies.
1. Fmoc-Free Peptide Building Blocks
Boc-beta-cyclopropyl-Ala-OH · DCHA is used as a protected amino acid building block in custom peptide synthesis workflows that rely on Boc-based strategies, particularly when incorporating a cyclopropyl-substituted alanine residue to probe backbone steric effects and conformational preferences. Peptide chemists and contract peptide manufacturers select this derivative to prepare short to medium-length peptides where precise residue identity and protection pattern are required for reliable segment assembly. The DCHA salt form is commonly used to improve practical weigh-out, reduce hygroscopicity issues relative to some free-acid forms, and support consistent coupling performance during routine synthesis and purification planning.
2. Peptidomimetic And SAR Studies
Boc-beta-cyclopropyl-Ala-OH · DCHA is frequently incorporated into peptidomimetic scaffolds and SAR-focused peptide analog series to evaluate how β-cyclopropyl substitution influences local geometry, side-chain presentation, and overall peptide conformation. Medicinal chemistry groups developing receptor-binding or enzyme-modulating peptide leads often use this building block to generate analogs that retain an alanine-like framework while adding a cyclopropyl element for property modulation. The Boc-protected amino acid format streamlines downstream assembly into defined sequences, enabling systematic comparison across libraries where the cyclopropyl β-substitution is the key variable.
3. Pharmaceutical Intermediate Development
Boc-beta-cyclopropyl-Ala-OH · DCHA is also used as a high-value pharmaceutical intermediate in the preparation of protected amino acid derivatives and peptide fragments destined for further synthetic elaboration. Process development and fine-chemical manufacturing teams use this material when a cyclopropyl-substituted alanine motif must be introduced under protection-compatible conditions, and when the Boc group provides a controllable handle for later transformation during route design. The DCHA salt supply form is advantageous for industrial-scale handling and reproducible material transfer into subsequent coupling, fragment condensation, or derivatization steps, supporting consistent downstream intermediate quality.
4. Structure-Driven Peptide Design
Boc-beta-cyclopropyl-Ala-OH · DCHA is applied in structure-driven peptide design efforts where introducing a cyclopropyl-bearing β-carbon is used to bias conformational ensembles and tune steric profiles around the peptide backbone. Researchers in chemical biology and structural peptide engineering incorporate this residue into defined peptide constructs for biophysical characterization, including sequence variants designed to isolate the impact of the β-cyclopropyl substitution. The protected amino acid format supports site-specific incorporation during controlled assembly, helping teams generate clean, sequence-verified materials for downstream analytical workflows such as LC-MS confirmation and comparative structural studies.
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