Paxillus atrotomentosus

Paxillus atrotomentosus alkali brown- purple violet AtroiDentin... 

Violet pigments (S. A-J) from the toadstool Paxillus atrotomentosus (Basidiomycetes) and cultures of P. panuoides, e.g., 5. B (C24H,gOg, Mr 434.40) and the isomeric S. C. In a biomimetic reaction, the 4,4 -dimethyl ether of ( )- flavomentin B was cyclized by the action of trifluoroacetic acid to furnish the corresponding derivatives of racemic spiromentins B and C. 

Several syntheses of parasorbic acid (7) have been reported (6-15). Osmundalactone (8) has also been isolated from the fungus Paxillus atrotomentosus (16). A synthesis of chiral aspyrone (9) has confirmed its absolute stereochemistry (17) and studies on its biosynthesis have continued (18). 

Buchanan, M.S., T Hashimoto, S. Takaoka, and Y. Asakawa (-h)-Osmundalactone, y-Lactones and Spiromentins from the Fungus Paxillus atrotomentosus. Phytochem., 40, 1251 (1995). 

Cycloleucomelone (14) Anthracophyllum archeri, A. discolor [artefact ] 385), Boletopsis leucomelaena = Polyporus leucomelas) [Teucomelone ] (7, 386), Paxillus atrotomentosus 365)... 

Flavomentin-B (35) Paxillus atrotomentosus, P. panuoides var. ionipus Orange 0.44 266, 371 nm... 

Acetyl-atromentin (45) Albatrellus cristatus (90), Omphalotus olearius [cultures], Paxillus atrotomentosus (397), P. panuoides (365,397), [c] (397) Orange 0.39 ... 

Gaylord, M.C., R.G. Benedict, G.H. Hatfield, and L.R. Brady Isolation of Diphenyl-Substituted Tetronic Acids from Cultures of Paxillus atrotomentosus. J. Pharm. Sci. 59, 1420 (1970). 

Herrmann, R., M. Holzapfel, C. Kilpert, W. Steglich, H.Besl, A. Bresinsky, and G. Geigenmuller Pilzfarbstoffe 52. tJber farblose Vorstufen des Atromentins und neue Terphenylchinone aus den Blatterpilzen Paxillus atrotomentosus und P. panuoides (Basidiomycetes). Liebigs Ann. Chem., in press. 

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