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Total synthesis of halichondrin C
Akihiko Yamamoto1, Atsushi Ueda, Paul Brémond
1Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
The first total synthesis of halichondrin C was achieved using novel methods for constructing its complex polycycle. Acid stability studies revealed the macrolactone
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
- Natural Product Synthesis
Background:
- Halichondrin C is a complex marine natural product.
- Previous synthetic efforts have not achieved a total synthesis.
- Understanding the structural features and stability is crucial.
Purpose of the Study:
- To achieve the first total synthesis of halichondrin C.
- To develop novel synthetic methodologies for complex polycycles.
- To investigate the acid stability of halichondrin C.
Main Methods:
- Development of a novel synthetic route.
- Utilized seven chromium-mediated coupling reactions for C-C bond formation.
- Acid stability studies were performed on halichondrin C and a C1-C16 model.
Main Results:
- Successfully completed the first total synthesis of halichondrin C.
- The C8-C14 polycycle was constructed using a developed synthetic method.
- The macrolactone was found to stabilize the C8-C14 polycycle under acidic conditions.
Conclusions:
- The first total synthesis of halichondrin C is now reported.
- The developed synthetic strategy is effective for constructing complex polycyclic structures.
- The macrolactone moiety plays a key role in the acid stability of halichondrin C.
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