Constituents of the fungi Daedalea quercina and Daedaleopsis confragosa var. tricolor

• Published in: Phytochemistry (Oxford) 2000-08, Vol.54 (8), p.757-762
• Main Authors: Roesecke, J, Koenig, WA
• Format: Article
• Language: English
• Subjects: Basidiomycete; Biological and medical sciences; Biological Factors - chemistry; Biological Factors - isolation & purification; Chemical constitution; Daedalea quercina; Daedaleopsis confragosa tricolor; Daedaleopsis confragosa var. tricolor; Fundamental and applied biological sciences. Psychology; Fungal plant pathogens; Molecular Structure; organic acids; Phytopathology. Animal pests. Plant and forest protection; Plant physiology and development; Polyporaceae; Polyporales - chemistry; Spectrum Analysis; Systematics. Morphology. Development cycle. Physiology; Triterpene derivatives; triterpenes
• ISSN: 0031-9422; 1873-3700
• DOI: 10.1016/S0031-9422(00)00130-8

Phytochemical examination of solvent extracts of the wood-rotting fungi Daedalea quercina and Daedaleopsis confragosa var. tricolor led to the isolation of five new triterpene derivatives and some known fungal constituents. All structures were identified by one- and two-dimensional NMR spectroscopy and mass spectrometry. From Daedalea quercina, the new natural products 16- O-acetylpolyporenic acid C, 16α-acetoxy-24-methylene-3-oxolanost-8-en-21-oic acid, (+)-24-methylene-3,23-dioxolanost-8-en-26-oic acid, (+)-3β,12β-dihydroxy-24-methyl-23-oxolanost-8-en-26-oic acid and 12β,23-epoxy-3α,23-dihydroxy-24-methyllanost-8-en-26-oic acid could be isolated. From Daedaleopsis confragosa var. tricolor, the compounds 3α-carboxyacetoxyquercinic acid, 3α-carboxyacetoxy-24-methylene-23-oxolanost-8-en-26-oic acid and 5α,8α-epidioxyergosta-6,22-dien-3β-ol were identified. These are the first described triterpene derivatives isolated from this fungus.