Copper-Catalyzed Cascade Preparation of Dihydropyrimidin-4-ones from <i>N</i>-(Prop-2-yn-1-yl)amides and Azides
作者:Jinjin Wang、Jing Wang、Ping Lu、Yanguang Wang
DOI:10.1021/jo401094j
日期:2013.9.6
Dihydropyrimidin-4-ones were efficiently synthesized from copper catalyzed reaction between N-(prop-2-yn-1-yl)amides and sulfonylazides under mild conditions in moderate to excellent yields (up to 96% yields). The cascade process involves the copper-catalyzed alkyne–azide cycloaddition, the formation of ketenimine intermediate, the intramolecular nucleophilic addition of ketenimine, and subsequent
N-(prop-2-yn-1-yl)酰胺和磺酰叠氮化物在温和条件下以铜催化反应以中等至优异的收率(高达96%的收率)有效地合成了二氢嘧啶-4-酮。级联过程涉及铜催化的炔-叠氮化物的环加成反应,烯酮亚胺中间体的形成,烯酮亚胺的分子内亲核加成以及随后的重排。