A sustainable C–H functionalization of indoles, pyrroles and furans under a blue LED with iodonium ylides
作者:Saibal Sar、Ranajit Das、Dhiraj Barman、Pikaso Latua、Souvik Guha、Ludovic Gremaud、Subhabrata Sen
DOI:10.1039/d1ob01219c
日期:——
Pyrrole and indole derivatives are functionalized via a green initiative with the dimethylmalonate derived phenyl iodonium ylide 4a in the presence of a blue LED via C–H functionalization of the respective heterocycles in methanol to generate the desired compounds 5–7 in moderate to good yields. Control experiments provide insight into the probable reaction mechanism. Finally, the strategy is successfully
吡咯和吲哚衍生物通过绿色倡议与丙二酸二甲酯衍生的苯基碘鎓叶立德4a在蓝色 LED 存在下通过甲醇中各自杂环的 C-H 官能化进行官能化,以中等至良好的产率生成所需的化合物5-7 . 对照实验提供了对可能反应机制的深入了解。最后,该策略成功应用于azepino[4,5- b ]indole 12a / b的生成。
Toward General Access to the <i>Aspidosperma</i>-Type Terpenoid Indole Alkaloids: Synthesis of the Key 3,3-Disubstituted Piperidones through Enantioselective Intramolecular Heck-Type Reaction of Chloroformamides
An enantioselective intramolecular Heck-type reaction of chloroformamides has been developed for the synthesis of 3,3-disubstituted piperidones. The desired piperidone was formed in the presence of a palladium catalyst, an optically active phosphoramidite ligand, K3PO4 and Ag3PO4. The obtained piperidone was converted to epieburnamonine.
Gold(I)-Catalyzed Tandem Cyclization Approach to Tetracyclic Indolines
作者:Yongxiang Liu、Wenqing Xu、Xiang Wang
DOI:10.1021/ol100153h
日期:2010.4.2
Two highly stereoselective cationic gold(I)-catalyzedtandem cyclization reactions of alkynylindoles are described. These reactions demonstrated a novel and general strategy to rapidly construct highly functionalized polycyclic indolines. This approach was successfully employed for a formal synthesis of the akuammiline alkaloid minfiensine.
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。