Blue LED-Mediated N–H Insertion of Indoles into Aryldiazoesters at Room Temperature in Batch and Flow: Reaction Kinetics, Density Functional Theory, and Mechanistic Study
作者:Debajit Maiti、Ranajit Das、Subhabrata Sen
DOI:10.1021/acs.joc.0c02649
日期:2021.2.5
blue light-mediated N–H insertion of indole and its derivatives into aryldiazoesters has been reported in a batch and flow strategy to afford the corresponding N-alkylated product in moderate-to-excellent yield. Detailed high-performance liquid chromatography-based reaction kinetics measurements, control experiments, and kinetic isotope effect reveal that 3-substitutedindoles with electron-withdrawing
Enantioselective Palladium-Catalyzed Carbene Insertion into the N−H Bonds of Aromatic Heterocycles
作者:Vanessa Arredondo、Stanley C. Hiew、Eugene S. Gutman、Ilandari Dewage Udara Anulal Premachandra、David L. Van Vranken
DOI:10.1002/anie.201611845
日期:2017.4.3
C3‐substituted indoles and carbazoles react with α‐aryl‐α‐diazoesters underpalladiumcatalysis to form α‐(N‐indolyl)‐α‐arylesters and α‐(N‐carbazolyl)‐α‐arylesters. The products result from insertion of a palladium‐carbene ligand into the N−H bond of the aromatic N‐heterocycles. Enantioselection was achieved using a chiral bis(oxazoline) ligand, in many cases with high enantioselectivity (up to 99 %
Blue LED Mediated C-H and N-H Insertion of Indoles into Aryldiazoesters and Iodonium Ylides
作者:Ludovic Gremaud、Subhabrata Sen
DOI:10.2533/chimia.2022.483
日期:——
mediated C-H and N-H insertion reaction in indoles and related heterocycles with aryl diazoesters and iodonium ylides as sources of carbenes. Blue LED effectively facilitates these conversions and was optimized from the option of numerous other LED lights. No metal catalysts were required. The reactions provide formation of differently alkylated indoles, pyrroles and furans. Control experiments and DFT
在此,我们讨论了与蓝色 LED 介导的吲哚和相关杂环中 CH 和 NH 插入反应相关的项目,其中芳基重氮酯和碘鎓叶立德作为卡宾来源。蓝色 LED 有效地促进了这些转换,并从众多其他 LED 灯的选项中进行了优化。不需要金属催化剂。该反应形成不同烷基化的吲哚、吡咯和呋喃。使用对照实验和DFT计算来了解反应机理。作为应用化合物,由烷基化产物合成了带有氮杂[4, 5-b]吲哚和螺哌啶基吲哚结构单元的化合物。