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Updated: Sep 12, 2025

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Total Synthesis of (+)-Pierisketone B
Qi Gu1, Grant D Walby1, Michael D Wood1
1Department of Chemistry, The University of Texas at Austin, Austin, Texas 78712, United States.
The first total synthesis of (+)-pierisketone B, a complex diterpene, was achieved. This study details novel synthetic strategies for constructing its unique tetracyclic framework and stereocenters.
Area of Science:
- Organic Chemistry
- Natural Product Synthesis
Background:
- (+)-Pierisketone B is a bioactive diterpenoid.
- It features a complex 7/5/6/5 tetracyclic carbocyclic framework with multiple stereocenters.
Purpose of the Study:
- To report the first total synthesis of (+)-pierisketone B.
- To develop novel synthetic methodologies for constructing complex carbocyclic frameworks.
Main Methods:
- Pauson-Khand cyclization to form the tricyclic core.
- Hydroxyl-directed hydrogenation for the cis-fused hydrindanone moiety.
- Mukaiyama aldol reaction and vinyl anion addition for A-ring formation.
Main Results:
- Successful total synthesis of (+)-pierisketone B.
- Construction of the intricate tetracyclic framework with numerous stereocenters, including two quaternary and five contiguous ones.
- A 20-step longest linear sequence from (-)-linalool.
Conclusions:
- The developed synthetic route is efficient for accessing (+)-pierisketone B.
- The study showcases innovative applications of key reactions in complex molecule synthesis.
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