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Total synthesis of (-)-strychnine
Yosuke Kaburagi1, Hidetoshi Tokuyama, Tohru Fukuyama
1Graduate School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
Journal of the American Chemical Society
|August 19, 2004
Summary
This study details the total synthesis of (-)-strychnine, a complex natural product. Key steps involved palladium-catalyzed coupling and novel cyclization strategies for constructing the intricate molecular framework.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
- Natural Product Synthesis
Background:
- Strychnine is a complex indole alkaloid with significant biological activity.
- The total synthesis of (-)-strychnine presents a considerable challenge in organic chemistry due to its intricate polycyclic structure.
Purpose of the Study:
- To describe a novel and efficient total synthesis of (-)-strychnine.
- To showcase innovative synthetic methodologies applicable to complex natural product synthesis.
Main Methods:
- Palladium-catalyzed coupling reaction to join the indole and vinyl epoxide fragments.
- A one-pot procedure for the synthesis of a nine-membered cyclic amine derivative from a diol precursor.
- Transannular cyclization to complete the strychnine core structure.
Main Results:
- Successful completion of the total synthesis of (-)-strychnine.
- Demonstration of the efficacy of palladium catalysis in forming key carbon-carbon bonds.
- Efficient construction of the challenging nine-membered ring intermediate.
Conclusions:
- The described synthetic route provides a viable pathway to (-)-strychnine.
- The employed methodologies offer potential for the synthesis of related alkaloids.
- This work contributes to the advancement of synthetic strategies for complex molecular architectures.
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