Lecidea fuscoatra

Huneck S, Schreiber K (1972) Wachstumsregulatorische Eigenschaften von Flechten- und Moos-Inhaltsstoffen. Phytochemistry 11 2429-2434 Huneck S, Schreiber K (1974) 2-0-Methylconfluentin-saure ein neues Depsid aus Lecidea fuscoatra. Phytochemistry 13 221-224... 

Chemically, the procedure of hydrolytic degradation of depsides and identification of the hydrolysis products remains a general and definitive procedure. For example the new depside 2-O-methylconfluentic acid (237) has been isolated from the lichen Lecidea fuscoatra and the structure deduced from spectroscopic data 190). Hydrolysis of the corresponding methyl ester, methyl 2-0-methylconfluentate (238) with methanolic potassium hydroxide gave 2,4-dimethoxy-6-(2-oxoheptyl)benzoic acid (239) and methyl 4-hydroxy-2-methoxy-6-pentylbenzoate (240) thus establishing the structure of this depside (Scheme 27). 

O-Methyl- OMe H OMe H CO H OMe CO2H C5H11 H Lecidea fuscoatra Crystallization Spectroscopic data. 190,... 

D-Methylconfluentinsaure ein neues Depsid aus Lecidea fuscoatra. Phytochem. 13, 221 (1974). 

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