Abstract
The labelling patterns in (–)-anagyrine 13 derived biosynthetically from (R)- and (S)-[1-2H]cadaverine 5 and 6, respectively in Anagyris foetida have been established by 2H NMR spectroscopy. Comparison of the composite labelling pattern 14 with that 11 published for (+)-sparteine has distinguished between two possible pathways for conversion of a tetracyclic intermediate into (–)-anagyrine.
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