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.
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
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
Metal-Free Radical [2 + 2 + 1] Cyclization of <i>ortho</i>-Cyanoarylacrylamides with Alkyl Nitriles: Synthesis of Pyrrolo[3,2-<i>c</i>]quinolines
作者:Tao Yang、Wen-Jin Xia、Jia-Qi Shang、Yi Li、Xiang-Xiang Wang、Meng Sun、Ya-Min Li
DOI:10.1021/acs.orglett.8b03638
日期:2019.1.18
A novel radical [2 + 2 + 1] cyclization of ortho-cyanoarylacrylamides with dual α-C–H bonds in alkyl nitriles has been developed. The reaction provides new facile and straightforward access to cyano-substituted pyrrolo[3,2-c]quinolines, which are important nitrogen-containing polyheterocycles. A possible mechanism for the transformation is proposed.
已开发出在烷基腈中具有双α-C–H键的邻氰基芳基丙烯酰胺的新型自由基[2 + 2 + 1]环化反应。该反应为氰基取代的吡咯并[3,2- c ]喹啉提供了新的便捷方法,氰基取代的吡咯并[3,2- c ]喹啉是重要的含氮多杂环化合物。提出了一种可能的转换机制。