Microwave-Assisted, Rhodium(III)-Catalyzed N-Annulation Reactions of Aryl and α,β-Unsaturated Ketones with Alkynes
作者:Hyejeong Lee、Yong-Kyun Sim、Jung-Woo Park、Chul-Ho Jun
DOI:10.1002/chem.201302699
日期:2014.1.3
New RhIII‐catalyzed, one‐pot N‐annulation reactions of aryl and α,β‐unsaturated ketones with alkynes in the presence of ammonium acetate have been developed. Under microwave irradiation conditions, the processes lead to rapid formation of the respective isoquinoline and pyridine derivatives with efficiencies that are strongly dependent on the steric nature of the aryl ring and enone substituents. By
在乙酸铵存在下,已开发出新的Rh III催化的芳基和α,β-不饱和酮与炔烃的一锅N环化反应。在微波辐射条件下,该方法导致各自异喹啉和吡啶衍生物的快速形成,其效率强烈地取决于芳基环和烯酮取代基的空间性质。通过采用该方案,可以高收率制备各种异喹啉和吡啶衍生物。此外,一种新的一锅法合成吡啶,涉及酮,甲醛,NH 4的四组分反应OAc和炔烃已被发现。该过程通过一条路线进行,该路线涉及酮与甲醛的初始醛醇缩合反应,生成支链的α,β-不饱和酮,然后将其用NH 4 OAc和炔烃进行Rh III催化的N环化。