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Updated: May 20, 2025

Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
Palladium-Catalyzed Cascade Carbonylation Reaction To Construct Ester Derivatives
Ming Li1, Shanmei Xu1, Fa-Xiang Yang1
1Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, P. R. China.
A new palladium-catalyzed reaction synthesizes ester-substituted benzofurans efficiently. This method broadens the scope of ester carbonylation using alkyl halides and aryl iodides.
Area of Science:
- Organic Chemistry
- Synthetic Chemistry
Background:
- Benzofuran derivatives are important scaffolds in medicinal chemistry.
- Existing ester carbonylation methods have limitations in scope and efficiency.
Purpose of the Study:
- To develop a novel, efficient, and versatile method for synthesizing ester-substituted benzofuran derivatives.
- To expand the substrate scope of palladium-catalyzed ester carbonylation reactions.
Main Methods:
- A one-step palladium-catalyzed reaction combining alkyl halides (undergoing in situ hydrolysis) and alkynyl aryl iodides.
- Utilized low palladium loading with excellent functional group compatibility.
Main Results:
- Successfully synthesized various ester-substituted benzofuran derivatives.
- Demonstrated broad applicability with both primary and secondary alkyl halides.
- Achieved high efficiency and functional group tolerance.
Conclusions:
- The developed method offers a significant advancement in the synthesis of ester-substituted benzofurans.
- This strategy expands the utility and scope of ester carbonylation reactions in organic synthesis.
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