Direct introduction of nitrogen and oxygen functionality with spatial control using copper catalysis.

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Medicinal Chemistry

Background:

• Directly introducing nitrogen (N) and oxygen (O) functionalities into organic molecules remains a significant challenge in synthetic chemistry.
• Existing methods often require multiple steps or harsh conditions, limiting access to complex N-O containing scaffolds.

Purpose of the Study:

• To present a novel, general synthetic methodology for the simultaneous installation of N- and O-functionality.
• To enable the construction of previously unexplored N-O heterocyclic and amino-alcohol structures.

Main Methods:

• Utilized earth-abundant copper salts as catalysts.
• Facilitated the generation of a carbon-centered radical intermediate.
• Achieved carbon-nitrogen bond formation via an aminoxyl radical intermediate.
• Employed intramolecular radical cyclization for termination.

Main Results:

• Successfully synthesized diverse N-O heterocyclic compounds.
• Developed a route to various amino-alcohol scaffolds with different linkers.
• Demonstrated the utility of copper catalysis in radical-mediated C-N bond formation.

Conclusions:

• The developed method offers a facile and efficient approach for accessing complex N-O containing molecules.
• This methodology expands the toolkit for synthetic chemists, particularly in the synthesis of heterocycles and amino-alcohols.
• The use of copper catalysis provides a sustainable and cost-effective alternative for N-O bond formation.