Antkowiak, R; Antkowiak, WZ; Banczyk, I; Mikolajczyk, L
NRC Research Press, [mailto:research.journals@nrc.ca], [URL:http://www.nrc.ca/cisti/journals/rp2_home_e.html]
A new optically active metabolite, involutone, was found in methanol, ethanol, or n-butanol extracts of freshly collected Paxillus involutus. The structure of this compound was proved to be 5-(3,4- dihydroxyphenyl)-2-(4-hydroxyphenyl)-2-hydroxy-4-cyclopenten-1,3-d ione on the basis of the spectral and chemical properties of involutone and its tetraacetyl derivative. In addition, a number of compounds of known structures such as linoleic and crotonic acids, mannitol, ergosterol, involutin, as well as methyl, ethyl, or n-butyl-b-D-glucopyranosides, and methyl, ethyl, or n-butyl linoleates, depending in both cases on the alcohol used in the extraction, were also isolated in a pure state from the mushroom.Original Abstract: L'extraction de Paxillus involutus par du methanol, de l'ethanol ou du butanol a permis d'isoler un nouveau metabolite optiquement actif, l'involutone. Sur la base des proprietes spectrales et chimiques de l'involutone et de son derive tetraacetyle, on a determine sa structure, la 5-(3,4-dihydroxyphenyl)-2-(4-hydroxyphenyl)-2-hydroxycyclopent- 4-ene-1,3- dione. de plus, les extractions du champignon ont permis d'isole a l'etat pur un certain nombre de composes de structures connues, dont les acides linoleique et crotonique, du mannitol, de l'ergosterol, de l'involutine ainsi que des b-D-glucopyranosides de methyle, d'ethyle ou de butyle et des linoleates de methyle, ethyle ou butyle suivant, dans chaque cas, la nature de l'alcool utilise pour les extractions.