DABCO as a mild and efficient catalytic system for the synthesis of highly substituted imidazoles via multi-component condensation strategy
作者:S. Narayana Murthy、B. Madhav、Y.V.D. Nageswar
DOI:10.1016/j.tetlet.2010.07.128
日期:2010.10
A simple and efficient protocol for the synthesis of highlysubstituted imidazoles is developed through the condensation of 1,2-dicarbonyl compound, aldehyde, and ammonium acetate or amine via multi-component condensation strategy. The present method gives good to excellent yields of substituted imidazoles.
The new bioglycerol-based carbon catalyst acts as an efficient, readily available, and reusable catalyst for the synthesis of 2,4,5-trisubstituted imidazoles/1,2,4,5-tetrasubstituted imidazoles, when aromatic aldehyde, ammonium acetate/amine, and 1,2-diketone are reacted in acetonitrile. (C) 2011 Elsevier Ltd. All rights reserved.