Three-Component Reactions of Arynes, Amines, and Nucleophiles via a One-Pot Process
作者:Gyoungwook Min、Jeongseob Seo、Haye Min Ko
DOI:10.1021/acs.joc.8b01058
日期:2018.8.3
An unprecedented three-component reaction of arynes, tertiary amines, and nucleophiles has been demonstrated through ammonium salt intermediates. This protocol allows access to tertiary aniline derivatives containing the piperazine motif in good-to-excellent yields. Expansively, this reaction can produce biologically important 2-(4-phenylpiperazin-1-yl)ethyl-containing molecules using arynes, 1,4-diazabicyclo(2
time-efficient preparation of a variety of functionalized aromatic heterocyclic products exhibiting an isoquinoline core. The approach is based on the normal electron-demand [4 + 2] aza-Diels–Alder cycloaddition of electron-rich N-aryl imines with arynes. Using this strategy, an expeditious total synthesis of the naturally occurring benzo[c]phenanthridinealkaloid nornitidine was achieved.
已经开发了两个级联反应,以高效地制备具有异喹啉核心的各种功能化芳族杂环产物。该方法基于富电子的N-芳基亚胺与芳烃的正常电子需求[4 + 2] aza-Diels-Alder环加成反应。使用该策略,可以快速合成天然存在的苯并[ c ]菲啶生物碱去甲替尼丁。
Cyclic Alkyne Approach to Heteroatom‐Containing Polycyclic Aromatic Hydrocarbon Scaffolds
作者:Evan R. Darzi、Joyann S. Barber、Neil K. Garg
DOI:10.1002/anie.201903060
日期:2019.7.8
strategy for accessing heteroatom‐containing polycyclicaromatichydrocarbons (PAHs). Our approach relies on the controlled generation of transient heterocyclic alkynes and arynes. The strained intermediates undergo in situ trapping with readily accessible oxadiazinones. Four sequential pericyclic reactions occur, namely two Diels–Alder/retro‐Diels–Alder sequences, which can be performed in a stepwise
Aryne Multicomponent Reactions by Directed C−H Activation
作者:Sunil Kumar Sunnam、Jitendra D. Belani
DOI:10.1002/chem.202100205
日期:2021.6.16
Arylation via ortho C−Hactivation by the aid of directing groups has been explored recently by many researchers. Herein, a palladium-catalyzed C−H arylation using 8-aminoquinoline as a bidentate directing group has been developed. The reaction furnishes only C−H arylation, unlike previous methods where cyclization to corresponding isoquinolones is observed. More interestingly, sequential C−H functionalization
Boryl (Hetero)aryne Precursors as Versatile Arylation Reagents: Synthesis through CH Activation and Orthogonal Reactivity
作者:Emilien Demory、Karthik Devaraj、Andreas Orthaber、Paul J. Gates、Lukasz T. Pilarski
DOI:10.1002/anie.201503152
日期:2015.9.28
(Pinacolato)boryl ortho‐silyl(hetero)aryl triflates are presented as a new class of building blocks for arylation. They demonstrate unique versatility by delivering boronate or (hetero)arynereactivity chemoselectively in a broad range of transformations. This approach enables the unprecedented postfunctionalization of fluoride‐activated (hetero)aryneprecursors, for example, as substrates in transition‐metal