Electrooxidative Ring-Opening Transformation of Polycyclic Aromatic Hydrocarbons

Area of Science:

• Organic Chemistry
• Electrochemistry
• Synthetic Methodology

Background:

• Aromatic C-C bonds in polycyclic aromatic hydrocarbons (PAHs) possess high stability, posing significant challenges for synthetic chemists.
• Selective functionalization and transformation of PAHs are crucial for materials science and medicinal chemistry.

Purpose of the Study:

• To develop a novel electrooxidative protocol for the selective cleavage of C-C bonds in PAHs.
• To demonstrate the utility of this method for generating dicarbonyl compounds from diverse PAH feedstocks.

Main Methods:

• Anodic oxidation of various polycyclic aromatic hydrocarbons (PAHs) in N,N-dimethylformamide (DMF).
• Electrochemical techniques to control the reaction pathway and selectivity.
• Characterization of the resulting dicarbonyl products.

Main Results:

• Selective cleavage of peripheral C-C bonds in phenacenes and corannulene was achieved.
• Cleavage of an inner C-C bond in dibenzo[g,p]chrysene was also demonstrated.
• The electrooxidative protocol provides a viable route to dicarbonyl compounds from PAHs.

Conclusions:

• The developed electrooxidative method offers a powerful new tool for activating and transforming stable C-C bonds in PAHs.
• This approach broadens the scope of synthetic transformations available for complex aromatic systems.
• The method shows promise for the synthesis of valuable dicarbonyl intermediates from abundant PAH resources.