Jump to content

Xerocomorubin

From Wikipedia, the free encyclopedia

This is an old revision of this page, as edited by The Nth User (talk | contribs) at 02:02, 20 August 2019 (→‎References: Added one category). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Xerocomorubin
Identifiers
Properties
C18H10O8
Molar mass 354.270 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Xerocomorubin is a pigment from the fungus group, the Boletales. It is the oxidized form of isoxerocomic acid.[1] Air oxidation is responsible its formation, and oxidizes faster to a similar pulvinic acid type pigment oxidized variant, variegatorubin.[2][3] The long wavelength has an absorption at 497 nm, 106 nm higher than its precursor isoxerocomic acid. Synthesis experiments have shown tetra-acetylation by acetic anhydride and sulphuric acid. Although xerocomorubin and variegatorubin give off the same deep red color and could simultaneously occur in a mushroom, extracts from the deep red colored mushroom Boletus rubellus Krombh. identified only variegatorubin by t.l.c, leading to the question the natural abundance of xerocomorubin.

References

  1. ^ Gill, M., and Steglich, W. (1987) Pigments of fungi (Macromycetes). Prog Chem Org Nat Prod 51: 1–317.
  2. ^ Gill, M., and Steglich, W. (1987) Pigments of fungi (Macromycetes). Prog Chem Org Nat Prod 51: 1–317.
  3. ^ Edwards and Gill (1973) Constituents of the Higher Fungi. Part X1l.l Identification of lnvolutin as (-)-cis-5-(3,4-Dihydroxyphenyl)-3,4-dihydroxy-2-(4-hydroxyphenyl)-cyclopent-2-enone and Synthesis of (+)-cis-lnvolutin Trimethyl Ether from Isoxerocomic Acid Derivatives