Novel N-H and N-alkylatedderivatives of meridianins have been synthesized as potential antitumor agents by a two-step conversion of N-tosyl-3-acetylindoles or N-alkyl-3-acetylindoles to the corresponding enaminones using DMF-DMA, with or without added pyrrolidine. Further cyclization with guanidine gave the corresponding 2-aminopyrimidines. The structures of the compounds, thus obtained, were proved
通过使用DMF-DMA将N-甲苯磺酰基-3-乙酰基吲哚或N-烷基-3-乙酰基吲哚经两步转化为相应的烯胺酮,合成了经络胺的新型N- H和N-烷基化衍生物作为潜在的抗肿瘤药。或不添加吡咯烷。用胍进一步环化得到相应的2-氨基嘧啶。由此获得的化合物的结构通过1 H和13 C NMR光谱,NOE实验和X射线分析证明。
Photocatalytic Cyclization Cascades by Radical Relay toward Pyrrolo[1,2-<i>a</i>]indoles: Synthesis, Mechanism, and Application
annulation cascade of unactivated N-alkene-linked indoles with Langlois’ reagent by a radical relay is developed at room temperature under blue LED irradiation. The reaction afforded a series of tri/difluoromethylated pyrrolo[1,2-a]indoles in moderate to good yields. The DFT study suggests that the reaction is ascribed to a rhodamine 6G-induced cyclization cascade involving vinyl addition-radical relay
在室温下,在蓝光 LED 照射下,通过自由基中继,形成了未活化的N-烯烃连接的吲哚与 Langlois 试剂的光催化成环级联。该反应以中等至良好的产率提供了一系列三/二氟甲基化吡咯并[1,2- a ]吲哚。 DFT 研究表明,该反应归因于罗丹明 6G 诱导的环化级联,涉及乙烯基加成自由基中继和氢原子抽象 (HAA) 过程,有趣的是,吡咯并[1,2- a ]吲哚被用作荧光染料进入荧光光谱和活细胞成像。本文展示了通过自由基中继和 HAA 过程进行光催化环化级联的初始示例。
Visible-Light-Promoted Cascade Carboxylation/Arylation of Unactivated Alkenes with CO2 for the Synthesis of Carboxylated Indole-Fused Heterocycles
作者:Han Yang、Qi Yang、Yang Yao、Peiyang Gu、Jianwei Sun、Song Sun
DOI:10.1021/acs.orglett.4c01967
日期:2024.8.2
carboxylation/arylation of indole-tethered unactivated alkenes with CO2 to access various carboxylated indole-fused heterocycles. This reaction is initiated by the addition of a CO2 radical anion to the alkene motif toward an alkyl carbon radical, followed by its addition to the aromatic ring, and then rearomatization to afford the final products. This reaction provides a facile and sustainable protocol for