One-Pot Amidation/C─H Halogenation by an Efficient Electrochemical Cascade

Area of Science:

• Green chemistry and sustainable synthesis
• Organic synthesis and methodology development
• Electrochemistry in organic transformations

Background:

• Amide and halogen functionalities are crucial in pharmaceuticals and organic chemistry.
• Existing methods for amide formation and halogenation are often inefficient, requiring multiple steps, harsh conditions, and additional reagents.
• There is a significant need for sustainable, streamlined synthetic routes.

Purpose of the Study:

• To develop a novel, single-step electrochemical cascade methodology.
• To achieve simultaneous amide bond formation and C-H halogenation.
• To provide an atom-economical and environmentally benign synthetic strategy.

Main Methods:

• Utilized a novel electrochemical cascade reaction.
• Combined amide bond formation and electro-induced C-H halogenation in one pot.
• Operated under mild, additive-free, and resource-efficient conditions.

Main Results:

• Successfully synthesized a wide range of halogenated N-aryl amides, carbamates, and ureas.
• Demonstrated the method's generality and robustness across over 145 examples.
• Validated the approach with complex, functional group-dense scaffolds and pharmaceutically relevant molecules, including successful scale-up.

Conclusions:

• The developed electrochemical cascade offers a sustainable and efficient route to valuable halogenated organic compounds.
• This method overcomes limitations of traditional synthetic approaches, enhancing scalability and environmental compatibility.
• The strategy provides streamlined access to important chemical entities for medicinal and organic chemistry applications.