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。
Homolytic substitution reactions of electron-rich pentatomic heteroaromatics by electrophilic carbon-centered radicals. Synthesis of .alpha.-heteroarylacetic acids
Efficient and selective homolytic substitutions (yields between 55 and 90%) of pyrrole, indole, and some pyrrole derivatives have been carried out using ambiphilic and electrophilic carbon centered radicals, generated in DMSO by Fe2+/H2O2 and alpha-cyano-, alpha-carbonyl-, and alpha,alpha'-dicarbonylalkyl iodides. The reaction is highly successful also with pyrroles substituted by electron-withdrawing groups, which has allowed an efficient synthesis of Tolmetin. A few extensions of this reaction to furan and thiophene are described.
Alkenyl C−H Insertion of Iodonium Ylides into Pyrroles: Studies toward the Total Syntheses of Tolmetin and Amtolmetin Guacil
作者:Christina Batsila、Efstathios P. Gogonas、George Kostakis、Lazaros P. Hadjiarapoglou
DOI:10.1021/ol0343008
日期:2003.5.1
[GRAPHICS]The thermal-catalyzed or photochemical reaction of iodonium ylides with pyrroles yields exclusively alpha-substituted pyrroles in moderate to good yields.