1-aminocyclobutane-1-carboxylic acid is a cyclic, non-proteinogenic amino acid featuring a cyclobutane ring bearing a carboxylic acid and a primary amino group at the same carbon (geminal substitution). The molecule contains both amino and carboxyl functional groups and presents a constrained, ring-imposed geometry that can influence side-chain sterics and conformational preferences compared with acyclic amino acids. It is used as a building block in peptide and peptidomimetic synthesis and in structure-activity or conformational studies where incorporation of a cyclobutane-constrained residue helps probe effects of backbone and side-chain geometry on molecular properties.
CAT No: CP19601
1-aminocyclobutane-1-carboxylic acid is a cyclobutane-containing amino acid building block featuring a cyclic, conformationally constrained side chain and a primary amino group paired with a carboxylic acid. Its rigid ring structure makes it a useful non-proteinogenic scaffold for peptide and peptidomimetic design where backbone or side-chain geometry can be tuned. In synthetic and materials workflows, the free amino acid form supports standard coupling and derivatization strategies used to incorporate cyclobutyl amino acid units into larger chemical architectures.
1. Peptidomimetic Building Block
1-aminocyclobutane-1-carboxylic acid is used by medicinal chemistry and peptide chemistry teams to construct peptidomimetics and constrained peptide analogs where a cyclobutane ring provides conformational restriction. Researchers commonly incorporate this amino acid unit into short bioactive peptide fragments and SAR (structure-activity relationship) libraries to probe how side-chain rigidity influences binding-site geometry and overall molecular shape. The free amino acid functionality enables straightforward conversion into activated coupling derivatives for custom peptide synthesis workflows, supporting rapid assembly of analog series for downstream biological and biophysical characterization.
2. Structure-Activity Relationship Studies
1-aminocyclobutane-1-carboxylic acid supports SAR development in programs that evaluate how ring-constrained amino acid substitutions affect potency-related properties without changing the peptide backbone composition broadly. Chemical biology groups and peptide optimization scientists use cyclobutyl amino acid variants to map structure-property relationships across analog panels, particularly when they want to decouple effects of side-chain conformational freedom from other chemical changes. Because the compound is a defined, single-residue building block, it is frequently selected for systematic substitution studies in which the stereochemical and conformational impact of a cyclic side chain is isolated in a controlled manner.
3. Pharmaceutical Intermediate Development
1-aminocyclobutane-1-carboxylic acid is also used as a practical intermediate precursor for downstream synthesis of cyclobutane-containing fragments used in medicinal chemistry programs. Process and development chemists value such amino acid building blocks as defined starting materials for preparing protected derivatives, amide-forming intermediates, and other functionalized cyclobutyl-containing motifs that can be incorporated into larger drug-discovery scaffolds. In industrial and contract research settings, the compound's amino acid functionality supports integration into established intermediate-manufacturing workflows where cyclobutane-containing stereochemically defined building blocks are required for library and lead-optimization chemistry.
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