Synthesis of Pyrrolo[1,2-<i>a</i>]quinoxalines via Gold(I)-Mediated Cascade Reactions
作者:Guannan Liu、Yu Zhou、Daizong Lin、Jinfang Wang、Lei Zhang、Hualiang Jiang、Hong Liu
DOI:10.1021/co1000844
日期:2011.5.9
of hydroamination and hydroarylation using a gold catalyst to enable and study the reactions between pyrrole-substituted anilines and alkynes. The gold(I)-catalyzed reactions were achieved in toluene at 80 °C over a reaction time of 1−6 h. These reactions are applicable to a variety of aromatic amino compounds and both the terminal and internal alkynes. Substituted pyrrolo[1,2-a]quinoxalines were obtained
在这项研究中,我们开发了一种使用金催化剂进行加氢胺化和加氢芳基化的高效串联方法,以实现并研究吡咯取代的苯胺和炔烃之间的反应。金(I)催化的反应是在80°C的甲苯中于1-6 h的反应时间内完成的。这些反应适用于各种芳族氨基化合物以及末端炔烃和内部炔烃。以中等至优异的产率获得了取代的吡咯并[1,2- a ]喹喔啉。在氘标记研究的基础上,提出了一种推测的机制,该机制涉及通过阳离子金络合物形成分子间CN键和分子内亲核反应。
Highly selective synthesis of mono- and bis-4,5-dihydropyrrolo[1,2-a]quinoxalines catalyzed by sustainable supported acidic ionic liquid in water media
AbstractPreparation of substituted as well as the selective synthesis of mono- and bis-4,5-dihydropyrrolo[1,2-a]quinoxalines using a highly efficient, sustainable, and reusable supported acidic ionic liquid is reported. The reaction method is ecofriendly and has the advantages of mild conditions, green solvent (H2O), short reaction times, and a reusable acidic catalyst. Graphical abstract
摘要报道了使用高效,可持续和可重复使用的负载型酸性离子液体制备取代的以及选择性合成单和双-4,5-二氢吡咯并[1,2- a ]喹喔啉。该反应方法是环境友好的,并且具有条件温和,绿色溶剂(H 2 O),反应时间短和可重复使用的酸性催化剂的优点。 图形概要