Total synthesis of (+)-crocacin C

Area of Science:

• Organic Chemistry
• Natural Product Synthesis
• Medicinal Chemistry

Background:

• Polyketide natural products, such as (+)-crocacin C, exhibit significant cytotoxic activity.
• The complex structure of (+)-crocacin C presents a challenge for chemical synthesis.
• Efficient synthetic routes are crucial for further biological evaluation and potential therapeutic development.

Purpose of the Study:

• To achieve the total synthesis of the cytotoxic natural product (+)-crocacin C.
• To develop a concise and efficient synthetic strategy for (+)-crocacin C.
• To explore a protecting-group-free approach for polyketide synthesis.

Main Methods:

• A 10-step linear synthesis was designed and executed.
• Commercially available Evans' chiral propionimide was used as a starting material.
• The synthesis was performed without the use of any protecting groups.

Main Results:

• The total synthesis of (+)-crocacin C was successfully accomplished.
• The synthesis proceeded in 10 linear steps with a 5% overall yield.
• The developed route demonstrates the feasibility of a protecting-group-free strategy.

Conclusions:

• A novel and efficient total synthesis of (+)-crocacin C has been established.
• The protecting-group-free approach simplifies the synthetic route and enhances its practicality.
• This synthesis provides a valuable method for accessing (+)-crocacin C for further research.