A Modular Dual-Catalytic Aryl-Chlorination of Alkenes

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Alkyl chlorides are crucial synthetic intermediates for C(sp3)-rich scaffolds.
• Existing methods for alkyl chloride preparation are limited.
• There is a need for efficient and diverse synthesis strategies.

Purpose of the Study:

• To develop a visible-light-mediated dual catalysis strategy for synthesizing arylated chloroalkanes.
• To create a modular approach for generating structurally diverse products.
• To address the underrepresentation of distinct methods for alkyl chloride preparation.

Main Methods:

• Visible-light-mediated dual catalysis.
• Coupling of diaryliodonium salts, alkenes, and potassium chloride.
• Ligand-design-driven development of copper(II)- and iron(III)-based atom-transfer catalysts.

Main Results:

• Successful aryl-chlorination of electron-poor alkenes using a copper(II) catalyst.
• Efficient aryl-chlorination of non-activated aliphatic alkenes and styrene derivatives using an iron(III) catalyst.
• Demonstrated complementarity of catalytic systems for broad substrate scope and high structural diversity.

Conclusions:

• The developed dual catalysis strategy provides a modular and efficient route to highly functionalized arylated chloroalkanes.
• The ligand-design approach enabled the creation of complementary catalysts for diverse alkene substrates.
• This work expands the synthetic utility of alkyl chlorides and offers new possibilities for complex molecule synthesis.