The polyketide folding mode in the biogenesis of isoshinanolone and plumbagin from Ancistrocladus heyneanus (Ancistrocladaceae)

G. Bringmann (Corresponding Author), M. Wohlfarth, Heiko Rischer, M. Rückert, J. Schlauer

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The biosynthetic orgins of the tetralone isoshinanolone and the related naphthoquinone plumbagin were investigated by feeding [13C2]-acetate to suspended callus cultures of Ancistrocladus heyneanus. The orientation of the acetate subunits was elucidated by a similar experiment using [2-13C]-acetate. The polyketide folding mode found for isoshinanolone and plumbagin constitutes a further hint at the acetogenic nature of the naphthylisoquinoline alkaloids, which are typical of A. heyneanus and other species of Ancistrocladaceae and Dioncophyllaceae.

The acetogenic origin and the polyketide folding mode of the naphthoquinone plumbagin (5) and the tetralone isoshinanolone (6) in Ancistrocladus heyneanus were established by feeding of differently 13C-labelled acetate and subsequent 13C NMR analysis.
Original languageEnglish
Pages (from-to)8445-8448
JournalTetrahedron Letters
Issue number46
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed


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