TY  - JOUR
A1  - Bringmann, Gerhard
A1  - Ortmann, Thomas
A1  - Zagst, Rainer
A1  - Schoener, Bernd
A1  - Assi, Laurent Ake
A1  - Burschka, Christian
T1  - +/- Dioncophyllacine A, a naphthylisoquinoline alkaloid with a 4-methoxy substituent from the leaves of Triphyophyllum peltatum
N2  - The isolation and structure elucidation of rac-dioncophyllacine A from the leaves of Triphyophyllun peltatum, is described. Unlike all other naphthylisoquinoline alkaloids, this fully dehydrogenated representative has an additional methoxy group at C-4, the position of which is deduced from NOE results. Dioncophyllacine A has a 7,1' site of the biaryl axis, as in dioncophylline A. Its constitution is confirmed by an X-ray structure analysis, which shows that the crystalline form of this new alkaloid is racemic.
KW  - Dioncophyllaceae
KW  - Triphyophyllum peltaturn
KW  - Dioncophyllaceae leaves
KW  - (± )-dioncophyllacine A
KW  - naphthylisoquinoline alkaloids
KW  - structure elucidation
Y1  - 1992
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-31873
ER  -