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Late-Stage Native Peptide Modification Approach to the Total Synthesis of Koshidacins A and B
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DOI：10.1021/jacsau.5c01394.png)
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Abstract
En 中文
Herein, the total synthesis of the antimalarial natural products, koshidacins A and B, is disclosed. We developed an inverse peptide elongation sequence to elaborate the linear tetrapeptide by leveraging a soluble hydrophobic tag (TCbz group) for liquid-phase peptide synthesis. The key advances involve head-to-tail macrocyclization to provide the carrier-supported cyclic tetrapeptide and photoinduced deaminative alkylation to edit the native peptide residue that enabled us to construct the requisite alkyl chain in this unique natural product family.
Keywords:
Cyclopeptides
superactive ester
radical
Giese addition
Katritzky salt