Palau'amine

Palau'amine
Names
Systematic IUPAC name
2,2'-Diamino-11-(aminomethyl)-12-chloro-1,1',3a,5',10a,11,12,13a-octahydro-5'-hydroxy-spiro[8H-cyclopenta[3,4]pyrrolo[1,2-a]imidazo[4,5-b]pyrrolo[1,2-d]pyrazine-13(10H),4'-[4H]imidazol]-8-one[1]
Identifiers
148717-58-2
3D model (Jmol) Interactive image
ChEMBL ChEMBL2079438
ChemSpider 17279008
MeSH C438976
PubChem 16122048
Properties
C17H22ClN9O2
Molar mass 419.87 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Palau'amine is a toxic alkaloid compound synthesized naturally by Stylotella agminata, a species of sea sponge found in the southwest Pacific Ocean. The name of the molecule derives from the island nation of Palau, near which the sponges are found.

The substance was first isolated and described in 1993.[2] Containing nine nitrogen atoms, the molecule is considered highly complex. The precise atomic structure was pinned down in 2007,[3] and two years later the molecule was synthesized in the lab by a team at the Scripps Research Institute in La Jolla, California.[4][5]

Biosynthesis

A pathway to this dimeric pyrrole-imidazole alkaloid has been hypothesized to include a key oxidation of a β-ketoester with Mn(OAc)3 initiated a cascade radical cyclization sequence to deliver an ageliferin skeleton.[6]

References

  1. Chemical Abstracts, accessed via SciFinder, version 2004.2; Chemical Abstracts Service: Columbus, OH, 2004; RN 148717-58-2
  2. Kinnel, Robin B.; Gehrken,, Henning Peter; Scheuer, Paul J. (1993). "Palau'amine: a cytotoxic and immunosuppressive hexacyclic bisguanidine antibiotic from the sponge Stylotella agminata". Journal of the American Chemical Society. 115 (8): 3376–3377. doi:10.1021/ja00061a065.
  3. Halford, Bethany (2007). "Sponge Alkaloids: Palau'amine Reconsidered". Chemical & Engineering News. 85 (10): 12. doi:10.1021/cen-v085n010.p012a.
  4. Seiple, Ian B.; Su, Shun; Young, Ian S.; Lewis, Chad A.; Yamaguchi, Junichiro; Baran, Phil S. (2010). "Total Synthesis of Palauamine". Angewandte Chemie International Edition. 49: 1095. doi:10.1002/anie.200907112.
  5. Madrigal, Alexis (2010-01-14). "Bizarre Sea Sponge Compound Finally Synthesized by Humans". Retrieved 2010-01-15.
  6. Ma Z, Lu J, Wang X, Chen C (Jan 7, 2011). "Revisiting the Kinnel-Scheuer hypothesis for the biosynthesis of palau'amine". Chem Commun (Camb). 47 (1): 427–9. doi:10.1039/c0cc02214d. PMC 2999656Freely accessible. PMID 20848010.
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