Electroreductive Radical Addition-Polar Cyclization Cascade to Access Cycloalkanes.

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Three-dimensional (3D) aliphatic ring systems offer greater structural complexity and topological diversity than flat aromatic scaffolds.
• These complex 3D structures are increasingly important in drug discovery and development.
• Existing synthetic methods may lack the generality or mildness required for diverse cyclic compound synthesis.

Purpose of the Study:

• To develop a mild and general electrochemical method for synthesizing structurally distinct cyclic compounds.
• To explore the modular synthesis of monocyclic alkanes, benzo-fused ring systems, and spirocycles.
• To utilize readily available starting materials like alkenes and alkyl halides.

Main Methods:

• Electrochemical synthesis
• Radical-polar crossover mechanism
• Modular assembly of cyclic structures

Main Results:

• Successful synthesis of diverse cyclic compounds including monocyclic alkanes, benzo-fused systems, and spirocycles.
• Demonstration of a mild and general reaction condition.
• Utilization of alkenes and alkyl halides as readily available precursors.

Conclusions:

• The described electrochemical method provides a versatile and efficient approach for constructing complex 3D aliphatic ring systems.
• This method expands the synthetic toolbox for medicinal chemists and drug discovery researchers.
• The radical-polar crossover mechanism enables modular synthesis of valuable cyclic scaffolds.