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Note | Special issue | Vol 47, No. 2, 1998, pp.985-990
Published online, 1st January, 1970
DOI: 10.3987/COM-97-S(N)62
Dioncophyllinol D, the First 4-Hydroxylated Naphthylisoquinoline Alkaloid, from the Leaves of Triphyophyllum peltatum

Gerhard Bringmann,* Matthias Wenzel, Markus Rückert, Kristina Wolf, Stefan Busemann, Manuela Schäffer, and Laurent Aké Assi

*Institut fr Organische Chemie, Universitat Wurzburg, Am Hubland D-97074 Wurzburg, Germany

Abstract

The first isolation of a 4-hydroxylated naphthylisoquinoline alkaloid, dioncophyllinol D (5), from the leaves of Triphyophyllum peltatum (Dioncophyllaceae), is described. Its structural elucidation is based mainly on NMR, degradative, and computational methods. With its rare 7,8’-linkage between the isoquinoline and naphthalene parts, 5 is one of the very few naphthylisoquinolines without a stable configuration at the biaryl axis.