Halonium Catalysis: An Underutilized and Underexplored Catalytic Concept in Olefin Functionalizations

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Oxyamination reactions are crucial for synthesizing nitrogen- and oxygen-containing organic compounds.
• Developing efficient and regioselective methods for intermolecular oxyamination remains a significant challenge in organic synthesis.

Purpose of the Study:

• To develop a novel iodonium-catalyzed intermolecular olefin oxyamination reaction.
• To utilize urea as a readily available and inexpensive source for both oxygen and nitrogen atoms.

Main Methods:

• Employing iodonium catalysis to activate alkenes for nucleophilic attack.
• Using urea as the O- and N-source in the intermolecular addition reaction.
• Investigating the reaction mechanism through mechanistic studies.

Main Results:

• Successfully achieved intermolecular olefin oxyamination using iodonium catalysis.
• Demonstrated the regioselective addition of urea across both activated and unactivated alkenes.
• Confirmed the involvement of an iodonium intermediate in the catalytic cycle.

Conclusions:

• Iodonium catalysis provides an effective strategy for intermolecular olefin oxyamination.
• Urea can be efficiently employed as a dual O- and N-source, offering a practical synthetic route.
• The developed method offers a regioselective approach to valuable nitrogen- and oxygen-containing molecules.