Biomimetic Studies Using Artificial Systems: IV: Biomimetic Peptide Synthesis by Using Multi-Functionalized Crown Ethers as a Novel Enzyme Model: A New Concept in Mimicking of Enzyme-Catalyzed Bond-Forming Reactions

Shigeki Sasaki, Kenji Koga

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9 Citations (Scopus)


A novel approach to the mimicking of enzyme-catalyzed bond-forming reactions has been examined using multi-functionalized chiral crown ethers. In addition to the 18-crown-6 moiety as a binding site, the hosts have one thiol and one thio ester with an N-protected a-amino acid or a peptide, and have successfully achieved peptide synthesis in an enzyme-mimetic reaction mode. This new method involves the following three key reactions. (1) Intra-complex thiolysis: the host carries out the rapid intra-complex thiolysis of a-amino acid ester salts to form the dithioester, corresponding to the assembly of two guests by the host. (2) Amide formation: intramolecular aminolysis occurs between the bound guests to form the amide bond. (3) Peptide chain elongation: as the thiol reactive group is regenerated, the above two reactions are repeated to elongate the peptide chain. Formal turnover of the enzyme model has been demonstrated by the synthesis of a tetrapeptide derivative by the repetition of the above processes.

Original languageEnglish
Pages (from-to)912-919
Number of pages8
JournalChemical and Pharmaceutical Bulletin
Issue number4
Publication statusPublished - Jan 1 1989
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Drug Discovery

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