Antimicrobial abietane-type diterpenoids from Torreya grandis

Phytochemistry. 2022 Sep:201:113278. doi: 10.1016/j.phytochem.2022.113278. Epub 2022 Jun 16.

Abstract

Twelve undescribed abietane-type diterpenoids, along with ten known analogues were isolated from the twigs and leaves of Torreya grandis var. merrillii Hu. Their structures were characterized by spectroscopic data analyses, single-crystal X-ray diffraction, and ECD spectra. Torgranols A-C possess three different architectures shaped via a common 6,7-seco-procedure and subsequent ring formations. In particular, torgranol A represents the first example of a 6,7-seco-abietane diterpenoid featuring a unique oxygen bridge between C-3 and C-6. The biosynthetic pathways for torgranols A-C were proposed. Some compounds displayed antimicrobial activities against Mycobacterium tuberculosis and/or Staphylococcus aureus.

Keywords: Abietane; Antimicrobial activities; Diterpenoid; Taxaceae; Torgranols A−L; Torreya grandis var. merrillii Hu.

MeSH terms

  • Abietanes / chemistry
  • Abietanes / pharmacology
  • Anti-Bacterial Agents / pharmacology
  • Anti-Infective Agents* / pharmacology
  • Diterpenes* / chemistry
  • Plant Leaves / chemistry
  • Taxaceae*

Substances

  • Abietanes
  • Anti-Bacterial Agents
  • Anti-Infective Agents
  • Diterpenes