作者:Sebastian J. Welsch、Michael Umkehrer、Cedric Kalinski、Günther Ross、Christoph Burdack、Jürgen Kolb、Martina Wild、Anja Ehrlich、Ludger A. Wessjohann
DOI:10.1016/j.tetlet.2015.01.043
日期:2015.2
A series of 2-(acetamide-2-yl)-imidazolines (II) with 5 points of diversity were prepared by an Ugi-4CR–Staudinger–aza-Wittig-sequence starting from simple azidoalkylamines. The intramolecular aza-Wittig cyclization between the iminophosphane and the tertiary amide of the Ugi product (I) was effected by short microwave irradiation. Competitive cyclization to the secondary amide was not relevant, however
由Ugi-4CR–Staudinger–aza-Wittig-序列从简单的叠氮基烷基胺开始制备了具有5个多样性点的一系列2-(乙酰胺-2-基)-咪唑啉(II)。Ugi产品(I)的亚氨基膦与叔酰胺之间的分子内氮杂-维蒂希环化反应是通过短波微波辐射进行的。与仲酰胺的竞争性环化无关紧要,但是,在某些情况下,观察到随后形成了双环邻位am(III)。