Iridium-Catalyzed Aryl C-H Sulfonamidation and Amide Formation Using a Bifunctional Nitrogen Source

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Efficient synthesis of N-arylamides is crucial for pharmaceuticals and materials science.
• Existing methods often require harsh conditions, expensive reagents, or multiple steps.

Purpose of the Study:

• To develop a novel, direct, and efficient strategy for sequential aryl and amidyl C-N bond formation.
• To utilize a bifunctional nitrogen source for a streamlined synthetic protocol.

Main Methods:

• Employed trichloroethoxysulfonyl azide as a bifunctional nitrogen source.
• Utilized Iridium (Ir)-catalyzed C-H sulfonamidation followed by desulfonative amide formation.
• Operated without the need for external oxidants or coupling reagents.

Main Results:

• Achieved effective sequential formation of aryl and amidyl C-N bonds.
• Demonstrated suitability for a range of benzamides and carboxylates (primary, secondary, tertiary alkyl, alkenyl, phenyl).
• Established a direct and efficient synthesis of N-arylamides.

Conclusions:

• The reported Ir-catalyzed protocol offers a powerful new approach for N-arylamide synthesis.
• The method is operationally simple and avoids common limitations of traditional synthetic routes.
• Provides access to valuable N-arylamides for diverse chemical and biological applications.