Lichen depsides, identification

Cardarelli M, Serino G, Campanella L et al (1997) Antimitotic effects of usnic acid on different biological systems. Cell Mol Life Sci 53 667-672 Cheng B, Cao S, Vasquez V et al (2013) Identification of anziaic acid, a lichen depside from Hypotrachyna sp., as a new topoisomerase poison inhibitor. PLoS One 8(4) e60770 Cohen PA, Towers GHN (1995) Anthraquinones and phenanthroperylenequinones from Nephroma laevigatum. J Nat Prod 58 520-526... [Pg.142]

Mass spectrometry is another useful tool for the identification and structural elucidation of lichen substances. Tlje principles of the method are given in a review by Lehmann and Schulten (1976). The mass spectra (MS) of numerous depsides, depsidones, depsones, dibenzofuranes and diphenylbutadienes have been discussed by Huneck et al. (1968a). In the same year, Letcher (1968) published the MS of some pulvinic acid derivatives. Martinez and Mestres (1972) recorded the MS of depsidones derived from norstictic acid, and Holland and... [Pg.22]

Chester DO, Elix JA (1978) The identification of four new meta-depsides in the lichen Ramalina asahinae. Aust J Chem 31 2745-2749... [Pg.451]

Elix JA, Chester DO, Gaul KL, Parker JL, Wardlaw JH (1989a) The identification and synthesis of further lichen p-orcinol para-depsides. Aust J Chem 42 1191-1199... [Pg.456]

Gunzinger J (1985) Etude de la composition chimique de Pseudevernia furfuracea (L.) Zopf. Synthese d un depside et d une depsidone. These, Univ Neuchatel Gunzinger J, Tabacchi R (1985a) Isolement et identification de Tacide furfurique, nouvelle depsidone du lichen Pseudevernia furfuracea (L.) Ach. Helv Chim Acta 68 1936-1939... [Pg.458]

Kupchan SM, Kopperman HL (1975) I-Usnic acid tumor inhibitor isolated from lichens. Experientia 31 625 Kurokawa S (1971) Results of isolation and culture of lichen fungi and algae. J Jpn Bot 46 297-302 Kurokawa T, Yoshimura I (1993) Identification of Cj-depsides including their phenol carboxylic acids and their esters by using three dimensional high performance liquid chromatography. Bull Koch Gakuen Coll 24 827-838... [Pg.464]

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). [Pg.149]

Chester, D. O., and J. A. Elix The Identification of four New meta-Depsides in the Lichen Ramalina asahinae. Austral. J. Chem. 31, 2745 (1978). [Pg.221]

Archer AW (1993) Identification of Orcinol para-Depsides in the Lichen Genus Pertusaria by Thin Layer Chromatography. Mycotaxon 46 1... [Pg.239]

Elix JA, Chester DO, Wardlaw JH, Wilkins AL (1990) The Identification of Two New p-Orcinol para-Depsides in the Lichen Pseudocyphellaria norvegica. Aust J Chem 43 191... [Pg.248]

Whalley WB (1949) The Application of the Modified Gattermann Reaction to Methyl and Ethyl Orsellinate. J Chem Soc 3278 72/. White FJ, James PW (1985) A New Guide to Microchemical Techniques for the Identification of Lichen Substances. British Lichen Soc Bull 57 1 722. White JD, Johnson AT (1990) Synthesis of the Lichen Metabolite (+)-Bourgeanic Acid and Conformational Analysis of its Dilactone. J Org Chem 55 5938 725. White JD, Johnson AT (1994) Synthesis of the Aliphatic Depside (+)-Bourgeanic acid. J Org Chem 59 3347... [Pg.274]

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