Chemistry of Novel Compounds Possessing Multifunctional Carbon Atoms. X. Synthetic Studies of Efflcient and Practical Chiral Derivatizing Agents Based on the .ALPHA.-Cyano-.ALPHA.-fluorophenylacetic Acid Structure.
arylation of ethyl cyanoacetate, malononitrile, and various ketones. The products from these reactions can be elaborated to substituted β-arylethylamines and used in microwave-assisted Pictet–Spengler reactions. The protocol developed is suitable for the synthesis of libraries of substituted isoquinolines.
Electrochemically induced SRN1 aromatic nucleophilic substitution. Monoanions of β-dicarbonyl and β-cyanocarbonyl compounds as nucleophiles
作者:Mehmet Ali Oturan、Jean Pinson、Jean-Michel Saveant、André Thiebault
DOI:10.1016/s0040-4039(00)99468-1
日期:1989.1
Monoanions deriving from β-dicarbonyl or β-cyanocarbonyl compounds can be used as nucleophiles in electrochemicallyinducedSRN1aromatic nucleophilic substitution with different substrates including cyano or benzoyl substitutedaromatic halides and 2-chloroquinoline.
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。
A General Method for the Directα-Arylation of Nitriles with Aryl Chlorides
作者:Jingsong You、John G. Verkade
DOI:10.1002/anie.200351954
日期:2003.10.27
P(<i>i</i>-BuNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: An Efficient Ligand for the Direct α-Arylation of Nitriles with Aryl Bromides
作者:Jingsong You、John G. Verkade
DOI:10.1021/jo034779h
日期:2003.10.1
A new catalyst system for the synthesis of alpha-aryl-substituted nitriles is reported. The bicyclic triaminophosphine P(i-BuNCH2CH2)(3)N (1b) serves as an efficient and versatile ligand for the palladium-catalyzed direct alpha-arylation of nitriles with aryl bromides. Using ligand 1b, ethyl cyanoacetate and primary as well as secondary nitriles are efficiently coupled with a wide variety of aryl bromides possessing electron-rich, electron-poor, electron-neutral, and sterically hindered groups.