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Updated: Jun 25, 2026
12:06
Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants
Published on: October 19, 2017
Total synthesis of phomactin A
Yu Tang1, Kevin P Cole, Grant S Buchanan
1Division of Pharmaceutical Sciences and Department of Chemistry, University of Wisconsin, Madison, Wisconsin 53705, USA.
Organic Letters
|March 6, 2009
Summary
Researchers completed the total synthesis of phomactin A, a complex natural product. This achievement showcases a novel oxa-[3 + 3] annulation strategy for constructing the core ABD-tricycle structure.
Area of Science:
- Organic Chemistry
- Natural Product Synthesis
- Medicinal Chemistry
Background:
- Phomactin A is a complex natural product with potential biological activities.
- Previous synthetic efforts have not achieved a complete total synthesis.
- The ABD-tricycle core presents significant synthetic challenges.
Purpose of the Study:
- To describe the first total synthesis of (+/-)-phomactin A.
- To showcase the utility of an intramolecular oxa-[3 + 3] annulation strategy.
- To elucidate structural intricacies of the ABD-tricycle and inform future synthetic endeavors.
Main Methods:
- Employed an intramolecular oxa-[3 + 3] annulation for ABD-tricycle construction.
- Utilized conformational analysis to guide key synthetic transformations.
- Developed a multi-step sequence to achieve the final target molecule.
Main Results:
- Successfully completed the total synthesis of (+/-)-phomactin A.
- Demonstrated the efficiency of the oxa-[3 + 3] annulation in building the core structure.
- Identified critical structural features through conformational analysis, enabling C5a-homologation.
Conclusions:
- The total synthesis of phomactin A is now complete.
- The developed synthetic strategy provides a robust route to complex polycyclic structures.
- Understanding conformational properties is crucial for the synthesis of intricate natural products.
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