Simultaneously Electrogenerated Cycloaddition Partners for Regiospecific Inverse-Electron-Demand Diels−Alder Reactions: A Route for Polyfunctionalized 1,4-Benzoxazine Derivatives
作者:Estelle Blattes、Maurice-Bernard Fleury、Martine Largeron
DOI:10.1021/jo035614b
日期:2004.2.1
2-alkylamino-1,4-benzoxazine derivatives is described. The reactions are regiospecific and diastereospecific in the case of heterocyclic annulation. This cascade sequence, wherein both cycloaddition partners are generated in situ, at room temperature, under metal-free conditions, allows the inverse-electron-demand Diels−Alder reaction of an o-iminoquinone diene and a secondary alkylenamine dienophile, two
描述了多种复杂的2-烷基氨基-1,4-苯并恶嗪衍生物的多步一锅法电化学合成。在杂环环化的情况下,反应是区域专一性和非对映专一性的。该级联序列(其中两个环加成伙伴均在室温下,无金属条件下原位生成)允许邻亚氨基醌二烯与仲亚烷基胺二亲二烯体进行电子反Diels-Alder反应,这两个化学上难以接近的不稳定实体。为了增加分子多样性,其中烯胺被单独制备的变体完成了上述程序。该反应的扩展对于产生杂环文库应该是有用的。