Imide arylation with aryl(TMP)iodonium tosylates.

Area of Science:

• Organic Chemistry
• Synthetic Methodology

Background:

• N-aryl phthalimides are important structural motifs in medicinal chemistry and materials science.
• Efficient and metal-free synthetic routes are highly desirable for their preparation.

Purpose of the Study:

• To develop a novel metal-free coupling reaction for the synthesis of N-aryl phthalimides.
• To investigate the mechanism of aryl transfer from aryl(TMP)iodonium tosylate salts.

Main Methods:

• Coupling of potassium phthalimide with unsymmetrical aryl(TMP)iodonium tosylate salts.
• Utilizing the electron-rich trimethoxyphenyl group as a directing ligand.

Main Results:

• Achieved moderate to high yields of N-aryl phthalimides.
• Demonstrated compatibility with electron-deficient and sterically hindered aryl substrates.
• Established electronic control over aryl transfer from the iodonium species.

Conclusions:

• The developed metal-free coupling provides a facile route to N-aryl phthalimides.
• The reaction mechanism involves controlled aryl transfer, facilitated by a dummy ligand.
• This method offers a valuable alternative for synthesizing diverse N-aryl phthalimide derivatives.