Efficient synthesis of C-N-coupled heterobiaryls by sequential N-H functionalization reactions

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Heterobiaryls are important structural motifs found in numerous biologically active compounds.
• Potent antibiotics often contain heterobiaryl structures, highlighting the need for efficient synthetic methods.
• Existing methods for heterobiaryl synthesis may lack substrate scope or selectivity.

Purpose of the Study:

• To develop a novel and efficient synthetic route for C-N-coupled heterobiaryls.
• To establish a sequential functionalization strategy for constructing complex heterobiaryl scaffolds.
• To provide a versatile method for accessing potential antibiotic drug candidates.

Main Methods:

• Sequential N-H functionalization involving rhodium-catalyzed N-H insertion.
• Regioselective palladium-catalyzed C-H amination as the second key step.
• Optimization of reaction conditions to achieve high stereoselectivity and regioselectivity.

Main Results:

• Successful synthesis of various C-N-coupled heterobiaryls.
• Demonstrated good substrate scope for both N-H insertion and C-H amination steps.
• Achieved excellent selectivity in the sequential coupling process.

Conclusions:

• The developed method offers a novel and effective approach for heterobiaryl synthesis.
• The high selectivity and broad substrate scope make this method valuable for medicinal chemistry.
• This strategy facilitates the discovery and development of new antibiotic agents.