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13C NMR spectroscopy of pyrrolizidine alkaloids



13C NMR spectroscopy of pyrrolizidine alkaloids



Phytochemistry 1(2): 439-443



The 13C NMR spectra of nine pyrrolizidine alkaloids of the macrocyclic diester type, seven of the corresponding N-oxides and of the parent base retronecine have been recorded and the signals assigned. The 13C NMR signals were found to be sensitive to structural variation in both the diester moiety and the heterocyclic ring system, providing useful information for structural elucidation, particularly when the 1H NMR spectra may be difficult to interpret.

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Accession: 014820012

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DOI: 10.1016/s0031-9422(00)95284-1


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