A novel copper catalyzed approach to oxazoles via enamide intermediates was developed from benzamides and β-diketones. The successive condensation and cyclization reactions afforded various 2,4,5-trisubstituted oxazoles in good yields.
由苯甲酰胺和
β-二酮开发了一种新型的
铜催化的经由烯酰胺中间体的
恶唑化合物。连续的缩合和环化反应以良好的产率提供了各种2,4,5-三取代的
恶唑。