Related Experiment Video
Updated: Nov 9, 2025

Preparation of 6-aminocyclohepta-2,4-dien-1-one Derivatives via Tricarbonyltroponeiron
Published on: August 12, 2019
Pentacyclic triterpenoids, fuscotorunones A and B, with ε-caprolactone in ring E from Fuscoporia torulosa
Masaaki Noji1, Tatsuro Yoneyama1, Kouichi Nishihama1
1Faculty of Pharmaceutical Sciences, Tokushima Bunri University, Yamashiro-cho, Tokushima, 7708514, Japan.
Abstract:
Fuscoporia torulosa (Pers.) (Hymenochaetaceae) is a mushroom forming woody fruiting body on living or dead trees. Two curious pentacyclic triterpenoids, fuscotorunones A and B, each of which has a unique ε-caprolactone in ring E, were isolated from the fruiting bodies of F. torulosa. The structures of fuscotorunones A and B were elucidated using MS analyses, IR spectrum and extensive 2D-homo and heteronuclear NMR data interpretation. Furthermore, a predicted biosynthetic pathway from 2,3-oxidosqualene to fuscotorunones A and B in F. torulosa is proposed.
Related Concept Videos
Aromatic Hydrocarbon Cations: Structural Overview
Removing one hydrogen from the intervening CH2 group...
Base-Catalyzed Ring-Opening of Epoxides
Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)
Five-Membered Heterocyclic Aromatic Compounds: Overview
Acid-Catalyzed Ring-Opening of Epoxides
Cycloalkanes
The IUPAC nomenclature of cycloalkanes follows similar rules that apply to...

