Journal
ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES
Volume 68, Issue 5-6, Pages 675-682Publisher
WALTER DE GRUYTER GMBH
DOI: 10.5560/ZNB.2013-3050
Keywords
Pulvinic Acids; N-(Protocatechuyl)phenylalaninols; Fungi; Taxonomy; Synthesis
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Funding
- Deutsche Forschungsgemeinschaft (DFG)
- Fonds der Chemischen Industrie
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The close genetic relationship of the mushrooms Retiboletus griseus and R. nigerrimus is supported by the occurrence of the orange-yellow retiboletic acid, resp. its methyl ester, in both species. The structures of these highly substituted pulvinic acid derivatives have been elucidated by spectroscopic investigations. R. nigerrimus also contains two N-protocatechuyl-L-phenylalaninol derivatives, nigerrimin A and B, the first reported occurrence of such compounds in nature. Their configuration was established by the synthesis of nigerrimin B.
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