The Cascade Methylation/Cyclization of <i>ortho</i>
-Cyanoarylacrylamides with Dicumyl Peroxide
作者:Tao Yang、Wen-Jin Xia、Bin Zhou、Yangchun Xin、Yuehai Shen、Ya-Min Li
DOI:10.1002/ejoc.201900918
日期:2019.9.8
A radical cascade methylation/cyclization of ortho‐cyanoarylacrylamides was developed by utilizing dicumylperoxide as a methylation reagent. This transformation provides a simple and straightforward approach to methylated quinoline‐2,4(1H,3H)‐diones, and exhibits a wide substrate scope. Furthermore, this reaction could be readily scaled up.
A novel Cu-catalyzed addition/cyclization cascade of o-cyanoarylacrylamide has been developed for the synthesis of various phosphonylated quinoline-2,4(1H,3H)-diones.
Abstract A radical addition/cyclizationcascade of o-cyanoarylacrylamides with magnesium nitrate hexahydrate is developed. This reaction exhibits good functional group tolerance and wide substrate scope, provides a highly efficient and practical access to nitro-containing quinoline-2,4(1H,3H)-diones. A radical addition/cyclizationcascade of o-cyanoarylacrylamides with magnesium nitrate hexahydrate
Visible light induced radical cascade cyclization of <i>ortho</i>-cyanoarylacrylamides with phosphine oxides for the preparation of phosphorylated quinoline-2,4(1<i>H</i>,3<i>H</i>)-dione
Visible light induced cascade cyclization of ortho-cyanoarylacrylamides with phosphineoxides for the preparation of phosphorylated quinoline-2,4(1H,3H)-dione. Products with moderate to good yields were efficiently isolated. A radical mechanism was proposed for this transformation.
可见光诱导邻氰芳基丙烯酰胺与氧化膦的级联环化,用于制备磷酸化喹啉-2,4(1 H ,3 H )-二酮。具有中等至良好收率的产品被有效分离。为这种转变提出了一种激进的机制。
Radical Annulation of 2-Cyanoaryl Acrylamides via C═C Double Bond Cleavage: Access to Amino-Substituted 2-Quinolones
作者:Wen-Jin Xia、Tai-Gang Fan、Zhi-Wei Zhao、Xin Chen、Xiang-Xiang Wang、Ya-Min Li
DOI:10.1021/acs.orglett.1c02281
日期:2021.8.6
2-cyanoaryl acrylamides via C═C double bond cleavage has been developed for facile and efficient access to a broad spectrum of functionalized 4-amino-2-quinolones, which are important N-heterocycles. In this transformation, the solvent THF is demonstrated to play a crucial role, and the addition of alkyl radicals to nitrile, 1,5-hydride shift, and cleavage of the C–C bond are involved in the mechanism