Total Synthesis of (-)-Vindorosine

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Medicinal Chemistry

Background:

• (-)-Vindorosine is a complex alkaloid with significant therapeutic potential.
• Existing synthetic routes to vindorosine and related alkaloids are often lengthy and lack scalability.
• Developing efficient and scalable synthetic strategies is crucial for accessing these valuable compounds.

Purpose of the Study:

• To develop a novel and scalable synthetic route for (-)-vindorosine.
• To establish key chemical transformations for constructing the core structure of vindorosine.
• To enable the synthesis of (-)-vindorosine and related alkaloid analogs.

Main Methods:

• Development of a highly diastereoselective vinylogous Mannich addition using dioxinone-derived lithium dienolates and indolyl N-tert-butanesulfinyl imines.
• Introduction of an intramolecular Heathcock/aza-Prins cyclization to form the C and E rings.
• Application of these methods to the total synthesis of (-)-vindorosine.

Main Results:

• A novel and scalable synthesis of (-)-vindorosine was successfully established.
• The vinylogous Mannich addition proceeded with high diastereoselectivity.
• The intramolecular Heathcock/aza-Prins cyclization efficiently constructed the highly substituted C and E rings.
• The synthesis provides access to (-)-vindorosine and related alkaloids.

Conclusions:

• The developed synthetic strategy offers an efficient and scalable approach to (-)-vindorosine.
• The key transformations, diastereoselective Mannich addition and aza-Prins cyclization, are robust and versatile.
• This work provides a valuable platform for the synthesis of vindorosine analogs for further biological evaluation.