Complex molecule synthesis by electrocatalytic decarboxylative cross-coupling

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Catalysis

Background:

• Modern organic synthesis relies on polar retrosynthetic analysis, which uses charge relationships to design synthetic routes.
• This established method, while fundamental, often requires complex strategies for chemoselectivity and oxidation state control, including protecting groups.
• Limitations in traditional methods necessitate the development of more intuitive and efficient synthetic approaches.

Purpose of the Study:

• To introduce a novel radical-based electrocatalytic cross-coupling method for organic synthesis.
• To enable a more intuitive and modular approach to constructing complex molecular architectures.
• To overcome the limitations associated with traditional polar retrosynthetic analysis.

Main Methods:

• A Ni/Ag-electrocatalytic cross-coupling reaction of substituted carboxylic acids was developed.
• The method utilizes a silver additive to form an active silver nanoparticle-coated electrode surface in situ.
• Carefully selected ligands were employed to modulate nickel reactivity and achieve high diastereoselectivity.

Main Results:

• The developed method provides an intuitive and modular approach to accessing complex molecular structures.
• High diastereoselectivity was achieved through judicious choice of reaction conditions and ligands.
• Concise syntheses of 14 natural products and two medicinally relevant molecules were successfully completed, demonstrating the method's utility.

Conclusions:

• This radical-based Ni/Ag-electrocatalytic cross-coupling represents a significant advancement in synthetic organic chemistry.
• The method simplifies the synthesis of complex molecules by circumventing the need for extensive protecting group strategies.
• It offers a powerful and versatile tool for accessing natural products and medicinally important compounds.