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Total synthesis of gambierol
Haruhiko Fuwa1, Makoto Sasaki, Masayuki Satake
1Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan.
Organic Letters
|August 17, 2002
Summary
The first total synthesis of the marine toxin gambierol was achieved. This study details a novel Stille coupling method for constructing its complex side chain.
Area of Science:
- Marine natural product chemistry
- Organic synthesis
- Toxicology
Background:
- Gambierol is a complex polycyclic ether marine toxin.
- Its intricate structure presents significant synthetic challenges.
- Understanding its synthesis is crucial for biological studies.
Purpose of the Study:
- To report the first total synthesis of gambierol.
- To develop a stereoselective method for constructing the triene side chain.
Main Methods:
- Utilized a Pd(PPh3)4/CuCl/LiCl-promoted Stille coupling reaction.
- Employed strategic bond formations for assembling the polycyclic core.
- Stereoselective construction of the sensitive triene side chain with a (Z,Z)-diene.
Main Results:
- Successfully synthesized gambierol, confirming its proposed structure.
- Demonstrated the efficacy of the Stille coupling for sensitive conjugated dienes.
- Established a reliable route to this challenging marine toxin.
Conclusions:
- The first total synthesis of gambierol is accomplished.
- The developed synthetic strategy is applicable to related marine polycyclic ethers.
- This synthesis provides access to gambierol for further biological evaluation.