Terminal-Selective Functionalization of Alkyl Chains by Regioconvergent Cross-Coupling

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Hydrocarbons are key building blocks for functionalized organic molecules.
• Developing new C-H bond functionalization methods is crucial for efficient synthesis.

Purpose of the Study:

• To develop a step-economical approach for C-C bond construction at the terminal position of linear alkanes.
• To enable regioselective arylation and alkenylation of alkanes.

Main Methods:

• In situ conversion of secondary alkyl bromides to alkyl zinc bromides.
• Regioconvergent Negishi coupling with aryl or alkenyl triflates using palladium catalysis.
• Optimization of phosphine ligands for selective linear product formation.

Main Results:

• Selective formation of linear cross-coupling products was achieved.
• A two-step sequence from linear alkanes to arylated products was established.
• The method allows for C-C bond construction at the terminal position of alkanes.

Conclusions:

• The described method offers a novel and efficient route to functionalized linear alkanes.
• This approach simplifies the synthesis of complex organic molecules from simple hydrocarbon precursors.
• The strategy enhances the utility of C-H functionalization in organic synthesis.