Synthesis of Indolizidine Alkaloids from Toads
Author Information
Author(s): Angela Nelson, H Martin Garraffo, Thomas F Spande, John W Daly, Paul J Stevenson
Primary Institution: Queens University, Belfast
Hypothesis
The structure of indolizidine alkaloid 5,9E-259B is postulated based on synthetic compounds.
Conclusion
The synthetic compounds had similar but not identical mass and FTIR spectra to the natural product, indicating that the postulated structure of 259B is incorrect.
Supporting Evidence
- The synthetic compounds had mass and FTIR spectra similar to the natural product.
- The GC-retention times of the synthetic compounds were markedly longer than that of the natural alkaloid.
- Further study is needed to determine the structure of the natural product.
Takeaway
Scientists made two versions of a toad chemical and found they were similar but not the same as the natural one, suggesting the natural one might be different.
Methodology
The synthesis involved using (S)-pyroglutamic acid as a starting material and various chemical reactions to produce the indolizidine compounds.
Limitations
The synthetic compounds did not match the natural product exactly, indicating potential structural differences.
Digital Object Identifier (DOI)
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