Selective Formation of 2-Imidazolines and 2-Substituted Oxazoles by Using a Three-Component Reaction
作者:Niels Elders、Eelco Ruijter、Frans J. J. de Kanter、Marinus B. Groen、Romano V. A. Orru
DOI:10.1002/chem.200800271
日期:2008.5.29
Selective formation of 2H-2-imidazolines and 2-substituted oxazoles by using a multicomponent reaction of amines, either aldehydes or ketones, and alpha-acidic isocyano amides or esters is described. By selecting the appropriate solvent, Ag(I) or Cu(I) catalyst, or by employing a weak Bronsted acid, the product formation can be fully controlled and directed quantitatively to the desired heterocyclic
描述了通过使用胺,醛或酮与α-酸性异氰胺或酯的多组分反应来选择性形成2H-2-咪唑啉和2-取代的恶唑。通过选择合适的溶剂,Ag(I)或Cu(I)催化剂,或通过使用弱布朗斯台德酸,可以完全控制产物的形成并将其定量地导向所需的杂环骨架。所描述的实验程序不仅显着增加了该复杂性产生三组分反应的相容性输入范围,而且还允许相当大的化学多样性:以这种方式可以利用两个不同支架中的至少四个多样性点。