Solid-phase synthesis of coralmycin A/ epi-coralmycin A and desmethoxycoralmycin A

Org Biomol Chem. 2021 Jul 21;19(28):6291-6300. doi: 10.1039/d1ob01062j.

Abstract

The total synthesis of the natural product coralmycin A/epi-coralmycin A, as well as a desmethoxy analogue is described. Synthesis was achieved via a divergent, bidirectional solid-phase strategy, including a key on-resin O-acylation, O to N acyl shift, and O-alkylation protocol to incorporate the unusual 4-amino-2-hydroxy-3-isopropoxybenzoic acid motifs. The synthetic natural product was generated as a 1 : 1 mixture of epimers at the central β-methoxyasparagine residue and exhibited potent antibacterial activity against a panel of ten Gram-negative and seven Gram-positive organisms. The desmethoxy analogue possessed significantly more potent antimicrobial activity against this panel with minimal inhibitory concentrations (MICs) as low as 50 nM.

MeSH terms

  • Anti-Bacterial Agents* / chemical synthesis
  • Anti-Bacterial Agents* / chemistry
  • Anti-Bacterial Agents* / pharmacology
  • Gram-Negative Bacteria / drug effects
  • Gram-Positive Bacteria / drug effects
  • Microbial Sensitivity Tests*
  • Molecular Structure
  • Structure-Activity Relationship

Substances

  • Anti-Bacterial Agents