Copper-Catalyzed C-O Bond Formation between Diaryliodonium Salts and Chelating Alcohols

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Traditional C-O bond formation methods often require harsh conditions like high temperatures and strong bases.
• Existing protocols frequently necessitate the use of additional ligands, increasing complexity and cost.
• Development of milder, more efficient catalytic systems for C-O bond formation is highly desirable.

Purpose of the Study:

• To develop a novel copper-catalyzed protocol for C-O bond formation.
• To utilize diaryliodonium salts and chelating alcohols as substrates.
• To achieve synthesis under mild, ligand-free conditions.

Main Methods:

• Copper(I) oxide (Cu2O) catalyzed reaction between diaryliodonium salts and chelating alcohols.
• Employing base-free conditions at room temperature.
• Utilizing only 2 mol % of Cu2O without additional ligands.

Main Results:

• High yields achieved for C-O bond formation using various diaryliodonium salts and diols.
• Broad substrate scope demonstrated, including β-heteroatom-functionalized alcohols.
• Reaction proceeds efficiently under mild conditions (room temperature, short reaction time, base-free).

Conclusions:

• The developed copper-catalyzed method provides a significant advancement for C-O bond formation.
• This protocol offers a practical and efficient route to aryl alkyl ethers.
• The mild conditions and ligand-free nature make it a valuable tool in organic synthesis.