作者:Rafael Bautista、Pablo Bernal、Rafael Herrera、Blanca M. Santoyo、J. Miguel Lazcano-Seres、Francisco Delgado、Joaquín Tamariz
DOI:10.1021/jo201335y
日期:2011.10.7
An efficient and versatile synthesis of novel exo-imidazolidin-2-one dienes is described. This involves the base-assisted condensation/cyclization cascade reaction of the monoimino derivatives of diacetyl with a series of isocyanates. This methodology enables preparation of symmetrical dienes, as long as the substrates have the same N substituent. Moreover, use of different N-substituted starting materials
描述了新型外-咪唑啉丁-2-酮二烯的有效且通用的合成方法。这涉及二乙酰基单亚氨基衍生物与一系列异氰酸酯的碱辅助缩合/环化级联反应。只要底物具有相同的N取代基,该方法就可以制备对称的二烯。此外,使用不同的N-取代的原料导致形成不对称的二烯。在Diels-Alder反应中评估了这些二烯的反应性,显示出很高的反应性。