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The sesquiterpenes of Collybia maculata and C. peronata (Basidiomycetes) have been reinvestigated. In addition to collybolide, isocollybolide and deoxycollybulidol, five new structurally related sesquiterpene lactones have been isolated. The structures have been established by spectroscopic methods. Stereochemical assignments required a derailed conformational investigation, which has been carried out at the AM1 level fur all compounds, and at the B3LYP level for some of them. This led to the inversion of the previously proposed C-7 configuration of deoxycollybolidol. The absolute configuration of collybolides could tentatively be inferred from CD studies. (C) 2001 Elsevier Science Ltd. All rights reserved.

Fungal metabolites. Part 45: The sesquiterpenes of Collybia maculata and Collybia peronata

TOMA, LUCIO;VIDARI, GIOVANNI
2001-01-01

Abstract

The sesquiterpenes of Collybia maculata and C. peronata (Basidiomycetes) have been reinvestigated. In addition to collybolide, isocollybolide and deoxycollybulidol, five new structurally related sesquiterpene lactones have been isolated. The structures have been established by spectroscopic methods. Stereochemical assignments required a derailed conformational investigation, which has been carried out at the AM1 level fur all compounds, and at the B3LYP level for some of them. This led to the inversion of the previously proposed C-7 configuration of deoxycollybolidol. The absolute configuration of collybolides could tentatively be inferred from CD studies. (C) 2001 Elsevier Science Ltd. All rights reserved.
2001
The Organic Chemistry/Polymer Science category includes resources concerned with the related fields of organic chemistry and polymer science. The organic chemistry resources deal with compounds of carbon with the exception of certain simple ones, such as the carbon oxides, carbonates, cyanides and cyanates (see Inorganic & Nuclear Chemistry). This category includes research on synthetic and natural organic compounds that may include other elements, such as hydrogen and oxygen, but also nitrogen, halogens, sulphur and phosphorous. Resources concerned with hydrocarbons, organic compounds containing only the elements carbon and hydrogen, are also included in this category. Examples are the alkanes, alkenes, alkynes and aromatics, such as benzene and naphthalene. Polymer science includes all resources dealing with the study, production and technology of polymers, which are compounds composed of very large molecules made up of repeating molecular units (monomers). Polymers may be natural substances, such as polysaccharides or proteins, or synthetic materials, such as nylon or polyethylene.
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Internazionale
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57
2791
2798
7
4
info:eu-repo/semantics/article
262
F., Castronovo; M., Clericuzio; Toma, Lucio; Vidari, Giovanni
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1.1 Articolo in rivista
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/456136
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