Iron-catalyzed regioselective direct oxidative aryl-aryl cross-coupling

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Biaryl compounds are crucial structural motifs in pharmaceuticals and materials science.
• Efficient synthesis of specifically substituted biaryls remains a challenge in organic chemistry.
• Cross-dehydrogenative coupling (CDC) offers a direct route for C-C bond formation, avoiding pre-functionalization steps.

Purpose of the Study:

• To develop a regioselective iron-catalyzed CDC reaction for the synthesis of 2,2"-disubstituted biaryls.
• To achieve selective C-C bond formation at the ortho position relative to directing functional groups.
• To provide a versatile and mild synthetic method for accessing complex biaryl structures.

Main Methods:

• Iron-catalyzed cross-dehydrogenative coupling (CDC) of two aromatic compounds.
• Utilizing tert-BuOOH (tert-butyl hydroperoxide) as a mild oxidant.
• Employing mild reaction conditions to promote selectivity and prevent side reactions.

Main Results:

• Achieved highly regioselective C-C bond formation at the ortho position of aromatic substrates.
• Successfully prevented the formation of undesired homocoupled products.
• Demonstrated the versatility of the method by synthesizing various functionalized 2,2"-disubstituted biaryls.

Conclusions:

• The developed iron-catalyzed CDC reaction provides an efficient and regioselective route to 2,2"-disubstituted biaryls.
• The method offers a valuable tool for synthetic chemists, enabling the construction of complex biaryl frameworks.
• Mild conditions and high selectivity make this a practical approach for accessing important chemical structures.