What is it about?
Imidazolium salts were conveniently prepared by direct aryl quaternization using arylboronic acids. This process features the tolerance of a broad range of functional groups and excellent chemoselectivity, and is especially effective for the synthesis of unsymmetrical imidazolium salts
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Why is it important?
This method tolerated a broad range of functional groups such as methoxy, halide, ester, acetyl, nitro and N,N-dimethylamino groups, etc. on both the imidazole side and the boronic acid side. The reaction could be run under an air atmosphere, which makes it very convenient and practical. The easy access to functional and unsymmetrical imidazolium salts is especially attractive for novel ligand and material synthesis.
Perspectives
This article provides a simple way to construct unsymmetrical imidazolium salts which are useful ionic liquid, organic catalyst and fluorescent material. I hope that people can design useful moleculars by our method.
Shiqing Li
Read the Original
This page is a summary of: Synthesis of unsymmetrical imidazolium salts by direct quaternization of N-substituted imidazoles using arylboronic acids, Chemical Communications, January 2014, Royal Society of Chemistry,
DOI: 10.1039/c4cc00474d.
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