Terphenyl quinones

Coloress storage forms of the long-known terphenyl-quinone atromentin from the toadstool Paxillus atro-tomentosus (Basidiomycetes). L. are esters of leuco-atromentins with (2Z, 4S,55)-4,5-epoxy-2-hexenoic acid that are cleaved under the action of alkali and ox-... 

The isolation of polyporic acid (11) [Stahlschmidt, 1877 (597, 592)], atromentin (13) [Thorner, 1878 (653)] and thelephoric acid (16) [ZOPF, 1889 (730)] marked the start of the chemical investigation of fungal pigments. The structure elucidation and chemistry of these compounds has been amply covered in Thomson s book (655) and does not need to be repeated here. In recent years several papers dealing with ultraviolet (311), infrared (208) and mass spectra (304, 465) and with the chromatography (267) and detection (274) of simple terphenyl-quinones have been published. Details of their known distribution in fungi are given in Table 3 and their physical properties are summarised in Table 4. 

Mosbach, K., H. Guilford, and M. Lindberg The Terphenyl Quinone Polyporic Acid Production, Isolation and Characterisation. Tetrahedron Letters 1974, 1645. 

Mosbach K., Guilford H., Lindberg M. The terphenyl quinone poly-poric acid production, isolation and characterization. Tetrahedron Letters, 17 1645-1648 (1974). 

The terphenyl quinones are closely related to the pulvinic acid pigments (e.g. 132,133) which are confined to lichens and when they... 

Polyporle acid (2,5-dihydroxy-3,6-diphenyl-l,4-ben-zoquinone, 3, 6 -dihydroxy-p-terphenyl-2, 5 -quinone). 

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