Abstract
Peloruside B (2), a natural congener of peloruside A (1), was isolated in sub-milligram quantities from the New Zealand marine sponge Mycale hentscheli. Peloruside B promotes microtubule polymerization and arrests cells in the G(2)/M phase of mitosis similar to paclitaxel, and its bioactivity was comparable to that of peloruside A. NMR-directed isolation, structure elucidation, structure confirmation by total synthesis, and bioactivity of peloruside B are described in this article. The synthesis features Sharpless dihydroxylation, Brown's asymmetric allylboration reaction, reductive aldol coupling, Yamaguchi macrolactonization, and selective methylation.
Publication types
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Research Support, N.I.H., Extramural
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Research Support, Non-U.S. Gov't
MeSH terms
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Animals
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Antineoplastic Agents / chemical synthesis*
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Antineoplastic Agents / isolation & purification*
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Antineoplastic Agents / pharmacology*
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Bridged Bicyclo Compounds, Heterocyclic / chemistry*
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Bridged Bicyclo Compounds, Heterocyclic / pharmacology*
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Cell Cycle / drug effects
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Lactones / chemical synthesis*
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Lactones / chemistry*
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Lactones / isolation & purification
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Lactones / pharmacology*
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Macrolides / chemical synthesis*
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Macrolides / chemistry
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Macrolides / isolation & purification
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Macrolides / pharmacology*
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Magnetic Resonance Spectroscopy
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Molecular Structure
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New Zealand
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Paclitaxel / chemistry
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Paclitaxel / pharmacology
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Porifera / chemistry*
Substances
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Antineoplastic Agents
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Bridged Bicyclo Compounds, Heterocyclic
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Lactones
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Macrolides
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peloruside A
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peloruside B
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Paclitaxel