Six-Step Synthesis of (±)-Lysergic Acid

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Medicinal Chemistry

Background:

• Lysergic acid is a core structure in various psychoactive compounds.
• Efficient synthesis of lysergic acid and its derivatives is crucial for drug discovery.
• Existing synthetic routes can be lengthy and complex.

Purpose of the Study:

• To develop a concise and practical synthesis of lysergic acid.
• To demonstrate a novel synthetic strategy applicable to neuroactive compounds.
• To synthesize a novel natural product derivative, 12-chlorolysergic acid.

Main Methods:

• A 6-step synthetic strategy from commercial aromatic precursors.
• Key reactions include coupling, dearomatization, and cyclization.
• Utilized a halopyridine and a 4-haloindole derivative.

Main Results:

• Achieved a concise synthesis of lysergic acid.
• Successfully synthesized 12-chlorolysergic acid, a novel natural product derivative.
• Demonstrated the utility of dearomative retrosynthetic analysis.

Conclusions:

• The developed synthesis is practical and efficient.
• The strategy facilitates the creation of novel lysergic acid derivatives.
• This approach opens avenues for discovering new neuroactive compounds.