Taking electrodecarboxylative etherification beyond Hofer-Moest using a radical C-O coupling strategy

Area of Science:

• Organic Chemistry
• Electrochemistry
• Synthetic Methodology

Background:

• Established electrodecarboxylative etherification relies on Hofer-Moest pathways, limiting substrate scope to stabilized carbocations.
• Oxidative decarboxylation generates radicals, which are further oxidized, restricting applications.

Purpose of the Study:

• To develop a new electrodecarboxylative method for C-O bond formation beyond Hofer-Moest limitations.
• To enable radical-radical coupling of alkyl carboxylates with 1-hydroxybenzotriazole.

Main Methods:

• Electrochemical radical-radical coupling using lithium alkylcarboxylates and 1-hydroxybenzotriazole.
• Platinum electrodes in methanol/pyridine solvent system.
• Analysis of substrate scope including primary and secondary alkylcarboxylates.

Main Results:

• Successful synthesis of alkyl benzotriazole ethers via electrochemical radical coupling.
• Demonstrated broad substrate scope for primary and secondary alkylcarboxylates.
• Benzotriazole products serve as versatile intermediates for alcohol synthesis and functional group transformations.

Conclusions:

• This novel electrochemical approach overcomes substrate limitations of traditional methods.
• It provides a new route for electrodecarboxylative C-O bond formation.
• The developed methodology offers a flexible platform for diverse synthetic applications.