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Cercosporin-Photocatalyzed [4+1]- and [4+2]-Annulations of Azoalkenes Under Mild Conditions
Published on: July 17, 2020
Concise total synthesis of (+)-crocacin C.
Gopal Sirasani1, Tapas Paul, Rodrigo B Andrade
1Department of Chemistry, Temple University, Philadelphia, Pennsylvania 19122, USA.
Researchers synthesized the cytotoxic natural product (+)-crocacin C using a 10-step linear synthesis. This efficient method avoided protecting groups, starting from readily available chiral materials.
Area of Science:
- Organic Chemistry
- Natural Product Synthesis
- Medicinal Chemistry
Background:
- (+)-Crocacin C is a cytotoxic natural product with potential therapeutic applications.
- The synthesis of complex natural products is crucial for drug discovery and development.
- Previous synthetic routes may have limitations in efficiency or step count.
Purpose of the Study:
- To develop an efficient and concise total synthesis of (+)-crocacin C.
- To explore a protecting-group-free synthetic strategy.
- To provide a scalable route for accessing this valuable compound.
Main Methods:
- Linear synthesis employing 10 steps.
- Utilized Evans' chiral propionimide as a starting material.
- No protecting groups were required during the synthesis.
Main Results:
- Successful synthesis of (+)-crocacin C achieved.
- Overall yield of 5% reported for the 10-step sequence.
- Demonstrated feasibility of a protecting-group-free approach.
Conclusions:
- The developed synthetic route is efficient for (+)-crocacin C.
- This synthesis offers a valuable pathway for further biological evaluation.
- The protecting-group-free strategy simplifies the overall process.
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