Straightforward Access to (Imidazol-2-yl)acetates by Reaction of 2-Unsubstituted Imidazole 3-Oxides with Dimethyl Acetylenedicarboxylate
作者:Grzegorz Mlostoń、Marcin Jasiński、Heinz Heimgartner
DOI:10.1002/ejoc.201001594
日期:2011.5
A new method for the preparation of 1,4,5-trisubstituted (imidazol-2-yl)acetates, based on the reaction of the corresponding imidazole 3-oxides with dimethyl acetylenedicarboxylate (DMAD) is described. Formation of the products is rationalized by a formal 1,3-dipolar cycloaddition and subsequent oxaloyl cleavage.
描述了一种制备 1,4,5-三取代(咪唑-2-基)乙酸酯的新方法,该方法基于相应的咪唑 3-氧化物与乙炔二甲酸二甲酯 (DMAD) 的反应。产物的形成通过正式的 1,3-偶极环加成和随后的草酰裂解来合理化。