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4. Novel Dimeric Metabolites from Alternaria tagetica

Author

Gamboa-Angulo, M. M., Alejos-Gonzalez, F., Escalante-Erosa, F., Garcia-Sosa, K., Delgado-Lamas, G., and Pena-Rodriguez, L. M.

Abstract

Two novel polyketides, bis-7-O-8‘ ‘.8-O-7‘ ‘- and bis-7-O-7‘ ‘.8-O-8‘ ‘-zinniol (2 and 3, respectively) were isolated from the organic crude extract of culture filtrates from Alternaria tagetica. Both structures were determined on the basis of their spectroscopic data (IR, MS, 1H NMR, 13C NMR, and 2D NMR experiments) and confirmed by chemical synthesis. Zinniol (1) was isolated as a major component, and its 13C NMR data was correctly assigned after careful analysis of data from its 2D NMR experiments (HMQC and HMBC).

Published
2000

7. Tagetolone and tagetenolone: two phytotoxic polyketides from Alternaria tagetica.

Author

Gamboa-Angulo MM, García-Sosa K, Alejos-González F, Escalante-Erosa F, Delgado-Lamas G, and Peña-Rodríguez LM

Subjects
Alternaria growth & development, Alternaria pathogenicity, Magnetic Resonance Spectroscopy, Mass Spectrometry, Molecular Structure, Mycotoxins isolation & purification, Parabens isolation & purification, Parabens pharmacology, Phenylethyl Alcohol isolation & purification, Plants microbiology, Xylenes chemistry, Alternaria chemistry, Mycotoxins chemistry, Parabens chemistry, Phenylethyl Alcohol analogs & derivatives
Abstract

Two new phytotoxic polyketides, tagetolone (1) and tagetenolone (2), in addition to tyrosol and p-hydroxybenzoic acid, have been isolated from the organic crude extract of culture filtrates from the fungal pathogen Alternaria tagetica. Complete characterization of all structures was carried out following a careful analysis of their spectroscopic data (IR, MS, (1)H and (13)C NMR, and 2D NMR experiments).

Published
2001
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