Abstract
Concise and efficient three-component domino [3+1+1] heterocyclization to highly substituted 2-(2′-azaaryl)imidazoles, promoted by K2CO3 under microwave irradiation conditions, has been developed. The reactions have broad substrate scope which includes a wide range of common commercially available aromatic aldehydes and heteroaryl-amidines. A mechanism involving the umpolung process has been proposed for formation of the 2-(2′-azaaryl)imidazoles.
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Acknowledgments
We are grateful for financial support from the National Science Foundation of China (21072163, 21232004, 21272095, and 21102124), PAPD of Jiangsu Higher Education Institutions, the NSF of Jiangsu Education Committee (11KJB150016), Jiangsu Science and Technology Support Program (no. BE2011045), the Qing Lan Project (12QLG006), and the Doctoral Research Foundation of Xuzhou Normal University (XZNU, no. 10XLR20).
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Zhang, XJ., Fan, W., Fu, LP. et al. Domino [3+1+1] heterocyclization providing an efficient umpolung strategy for synthesis of 2-(2′-azaaryl)imidazoles. Res Chem Intermed 41, 773–783 (2015). https://doi.org/10.1007/s11164-013-1227-8
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DOI: https://doi.org/10.1007/s11164-013-1227-8