The yellow pigments of Beauveria species. Structures of tenellin and bassianin

Canadian Journal of Chemistry
1977.0

Abstract

<jats:p> Tenellin and bassianin are deduced from chemical and spectroscopic evidence to be the 3-[(E,E)-4,6-dimethylocta-2,4-dienoyl] and 3-[(E,E,E)-6,8-dimethyldeca-2,4,6-trienoyl] derivatives of 1,4-dihydroxy-5-(p-hydroxyphenyl)-2(1H)-pyridone. Spin–spin coupling information in the <jats:sup>1</jats:sup>H and <jats:sup>13</jats:sup>C nuclear magnetic resonance spectra after biosynthetic enrichment of tenellin with <jats:sup>13</jats:sup>C and <jats:sup>15</jats:sup>N isotopes was a valuable aid in elucidating the structure.

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