Palladium-Catalyzed C-H Bond Functionalization Reactions Using Phosphate/Sulfonate Hypervalent Iodine Reagents

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• C-H functionalization is crucial for molecule synthesis.
• Developing efficient and selective methods remains a challenge.
• Hypervalent iodine reagents offer unique reactivity profiles.

Purpose of the Study:

• To develop a new, operationally simple palladium-catalyzed C-H functionalization.
• To utilize a novel organophosphorus/sulfonate hypervalent iodine reagent.
• To achieve diverse functionalizations of C-H bonds.

Main Methods:

• Palladium catalysis.
• Utilizing a hypervalent iodine reagent as oxidant and functional group source.
• Employing mild reaction conditions.

Main Results:

• Successful oxidative phosphorylation, sulfonation, and hydroxylation of benzyl C(sp3)-H bonds.
• Efficient hydroxylation and arylation of aryl C(sp2)-H bonds.
• Excellent site-selectivity achieved in all transformations.

Conclusions:

• A versatile and operationally simple C-H functionalization strategy is established.
• The developed method allows for diverse functional group installation.
• The resulting C-OSO2R bond serves as a versatile handle for further synthetic diversification.