Light-Promoted Copper-Mediated Radical Alkylarylation of Alkenes via Truce-Smiles Rearrangement

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Catalysis

Background:

• Formation of all-carbon quaternary carbon centers is a significant challenge in organic synthesis.
• Existing methods often struggle with steric hindrance and side reactions like beta-hydride elimination.
• Radical reactions offer alternative pathways but require precise control.

Purpose of the Study:

• To develop an efficient method for the 1,2-alkylarylation of alkenes.
• To establish a copper-mediated radical Truce-Smiles rearrangement for constructing quaternary carbon centers.
• To overcome limitations of existing synthetic strategies for hindered substrates.

Main Methods:

• Utilizing alkyl iodides as radical coupling electrophiles.
• Employing a copper catalyst to mediate the radical Truce-Smiles rearrangement.
• Conducting the reaction under mild basic conditions to prevent side reactions.

Main Results:

• Successful formation of all-carbon quaternary carbon centers.
• Demonstrated compatibility with a wide range of functionalized alkyl iodides and alkenes.
• Achieved good product yields, showcasing the method's efficiency and scope.

Conclusions:

• The developed method provides an efficient route to complex molecules with quaternary centers.
• The copper-mediated radical Truce-Smiles rearrangement offers a valuable tool for synthetic chemists.
• This approach overcomes steric hindrance and avoids common side reactions in alkene functionalization.