Cu-Electrocatalytic Diazidation of Alkenes at ppm Catalyst Loading

Area of Science:

• Organic Chemistry
• Catalysis
• Electrochemistry

Background:

• The 1,2-diamine structure is crucial in pharmaceuticals and natural products.
• Traditional alkene diazidation methods often require high catalyst loadings, specific olefin types, and chemical oxidants, limiting practical applications.

Purpose of the Study:

• To develop a highly efficient and scalable copper-electrocatalytic method for alkene diazidation.
• To overcome the limitations of existing methods, particularly regarding catalyst loading and substrate scope.

Main Methods:

• Utilizing a copper(II) acetylacetonate precatalyst at an exceptionally low loading (0.02 mol %).
• Employing an electrocatalytic approach for alkene diazidation without exogenous ligands.
• Demonstrating scalability and compatibility with diverse functional groups.

Main Results:

• Achieved a highly efficient alkene diazidation using only 0.02 mol % copper precatalyst.
• The electrocatalytic method proved scalable and tolerant of various functional groups.
• Successfully applied the reaction to α,β-unsaturated carbonyl compounds and a wide range of substituted unactivated alkenes.

Conclusions:

• The developed Cu-electrocatalytic alkene diazidation is a practical and scalable synthetic strategy.
• This method offers a significant advancement in accessing vicinal primary diamines with minimal catalyst usage.