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Short Paper | Regular issue | Vol 89, No. 12, 2014, pp.2760-2770
Published online, 11th December, 2014
DOI: 10.3987/COM-14-13107
γ-Lactonic and Linear Carboxylic Acids from Cultured Lichen Mycobionts of Graphis scripta

Yukiko Takenaka, Nobuo Hamada, and Takao Tanahashi*

*Organic chemistry, Kobe Pharmaceutical University, 4-19-1 Motoyamakita-machi, Higashinada-ku, Kobe 658-8558, Japan

Abstract

Spore-derived mycobionts of the lichen Graphis scripta collected in Nikko, Japan, were cultivated on a malt-yeast extract medium supplemented with 10% sucrose to produce three new carboxylic acids 13. Their structures were characterized by chemical and spectroscopic methods. These compounds are prototypes of characteristic lichen substances, γ-lactonic and linear carboxylic acids with a long side chain, and were obtained as enantiomeric mixtures.