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Publicly Available Published by De Gruyter June 2, 2014

New Pulvinic Acid and Phenylalaninol Derivatives from the Mushrooms Retiboletus griseus and R. nigerrimus

Gertraud Gruber, Lydia Kerschensteiner, Ryuji Marumoto and Wolfgang Steglich

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

Graphical Abstract

 New Pulvinic Acid and Phenylalaninol Derivatives from the Mushrooms Retiboletus griseus and R. nigerrimus

New Pulvinic Acid and Phenylalaninol Derivatives from the Mushrooms Retiboletus griseus and R. nigerrimus

Received: 2013-2-14
Published Online: 2014-6-2
Published in Print: 2013-6-1

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