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Novel Benzotropolone and 2 H ‐Furo[3,2‐ b ]benzopyran‐2‐one Pigments from Tricholoma aurantium (Agaricales)
Author(s) -
Klostermeyer Dörte,
Knops Liliana,
Sindlinger Tilman,
Polborn Kurt,
Steglich Wolfgang
Publication year - 2000
Publication title -
european journal of organic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.825
H-Index - 155
eISSN - 1099-0690
pISSN - 1434-193X
DOI - 10.1002/(sici)1099-0690(200002)2000:4<603::aid-ejoc603>3.0.co;2-5
Subject(s) - chemistry , pigment , orange (colour) , benzopyran , agaricales , stereochemistry , organic chemistry , botany , food science , taxonomy (biology) , biology
The bright orange‐red color of the toadstool Tricholoma aurantium is due to the benzotropolone pigment aurantricholone ( 1 ). The compound is at least partially present as the calcium salt. Minor pigments are the yellow 2 H ‐furo[3,2‐ b ]benzopyran‐2‐one derivatives aurantricholides A ( 7a ) and B ( 7b ), which exhibit strong green fluorescences. Their structures have been established by total syntheses.