An Efficient and Mild CuI/<scp>l</scp>-Proline-Catalyzed Arylation of Acetylacetone or Ethyl Cyanoacetate
作者:Yongwen Jiang、Nan Wu、Haihong Wu、Mingyuan He
DOI:10.1055/s-2005-918921
日期:——
The coupling reaction of aryl iodides with acetylacetone or ethyl cyanoacetate under catalysis of CuI/l-proline works at relatively mild conditions to provide 3-aryl-2, 4-pentanediones and α-aryl cyanoacetates in moderate to good yields.
Visible Light instead of Transition Metal: Electron Donor Acceptor Complex Enabled Cross‐Coupling of Aryl Halides with Active Methylene Compounds
作者:Alexey A. Volkov、Dmitry I. Bugaenko、Alexander V. Karchava
DOI:10.1002/adsc.202301192
日期:2024.2.19
An arylation of anions of activemethylene compounds with aryl halides provides an access to synthetically versatile α-arylated 1,3-diketones, β-keto esters, β-keto nitriles, β-cyano esters, etc. Previously, these C−C cross-coupling reactions have been accomplished only using transition metal-based catalysts. Herein, we demonstrate that these arylations can be successfully realized under catalyst-free
活性亚甲基化合物的阴离子与芳基卤化物的芳基化提供了合成通用的 α-芳基化 1,3-二酮、β-酮酯、β-酮腈、β-氰基酯等的途径。以前,这些 CC 交叉-偶联反应仅使用过渡金属基催化剂即可完成。在此,我们证明这些芳基化可以在无催化剂条件下采用电子供体-受体(EDA)复合物光活化策略成功实现。该方案进一步优化,用于通过分子内 C−C 偶联半一锅合成吲哚衍生物。
Ethyl Cyanoacetate: A New Cyanating Agent for the Palladium-Catalyzed Cyanation of Aryl Halides
作者:Shuyan Zheng、Chunhui Yu、Zhengwu Shen
DOI:10.1021/ol3014914
日期:2012.7.20
A new Pd-catalyzed cyanation reaction has been discovered using ethyl cyanoacetate as the cyanating reagent. A variety of electron-rich and electron-deficient aryl halides were efficiently converted into their corresponding nitriles in good to excellent yields.