Oxidative para-triflation of acetanilides

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Triflation is a crucial reaction in organic synthesis.
• Developing efficient and regioselective triflation methods is important for accessing complex molecules.

Purpose of the Study:

• To develop a novel method for direct triflation of acetanilide derivatives.
• To achieve regioselective triflation at the para position.
• To explore the compatibility of the method with various substituents and the synthesis of arylnonaflates.

Main Methods:

• Direct triflation of acetanilide derivatives using silver triflate.
• Employing mild iodine(III)-mediated oxidative conditions.
• Utilizing a range of ortho and meta substituted aromatic rings.

Main Results:

• Successful direct triflation of acetanilide derivatives was achieved.
• The reaction demonstrated excellent regioselectivity, favoring the para position.
• The method tolerated a variety of ortho and meta substituents on the aromatic ring.
• Arylnonaflates were prepared in synthetically useful yields.

Conclusions:

• A new, mild, and regioselective method for direct triflation of acetanilide derivatives has been established.
• This methodology provides a valuable tool for the synthesis of triflated compounds and arylnonaflates.
• The reaction's tolerance to substituents broadens its applicability in organic synthesis.