Palladium-Catalyzed Cascade Decarboxylative Amination/6-<i>endo-dig</i> Benzannulation of <i>o</i>-Alkynylarylketones with <i>N</i>-Hydroxyamides To Access Diverse 1-Naphthylamine Derivatives
An efficient and practical one-pot strategy to produce highly substituted 1-naphthylamines via sequential palladium-catalyzed decarboxylative amination/intramolecular 6-endo-dig benzannulation reactions has been described. In this reaction, a broad range of electron-rich, electron-neutral, and electron-deficient o-alkynylarylketones react well with N-hydroxyl aryl/alkylamides to give a diversity of
general synthetic method for a wide range of medicinally useful 2-carboxylate derivatives of acridinols, quinolinols, and naphthalenols has been developed via silver-catalyzed electrophilic cyclization of 3-(2-alkynyl)aryl-β-ketoesters. The designed reaction involved selective C–C bond formation on more electrophilic alkynyl carbon, which resulted in the regioselective 6-endo-dig cyclized product, as confirmed
Gold‐Catalyzed Carbocyclization/C=N Bond Formation Cascade of Alkyne‐Tethered Diazo Compounds with Benzo[
<i>c</i>
]isoxazoles for the Assembly of 4‐Iminonaphthalenones and Indenes
作者:Ming Bao、Xiongda Xie、Wenhao Hu、Xinfang Xu
DOI:10.1002/adsc.202100602
日期:2021.8.13
carbocyclization/C=Nbondformation cascade reaction has been developed for the synthesis of polyfunctionalized 4-iminonaphthalenones and indenes in good to high yields under mild reaction conditions. The reaction goes through 5/6-endo-dig diazo-yne carbocyclization to form the endocyclic vinyl carbene species from corresponding alkyne-tethered diazo compounds, followed by electrophilic addition/N−O bond cleavage/aromatization
Synthesis of Indeno[1,2-<i>c</i>]furans via Cobalt-Catalyzed Radical–Polar Crossover [3 + 2] Cycloaddition of <i>o</i>-Alkynylaryl β-Dicarbonyls
作者:Guo-Cai Yuan、Peng Guo、Zhi-Hua Wang、Lingyun Zhu、Xinglei He、Yuanming Li、Ke-Yin Ye
DOI:10.1021/acs.orglett.2c03297
日期:2022.11.11
Fused polycyclic furans are privileged structural scaffolds in materials chemistry, including organic semiconductors. Specifically, indeno[1,2-c]furans are an interesting type of polycyclic furans featuring a fused furan and indenone framework. Unfortunately, limited studies on their photophysical properties have been performed, probably owing to the lack of efficient and straightforward approaches
稠合多环呋喃是材料化学(包括有机半导体)中的特殊结构支架。具体来说,茚并[1,2- c ]呋喃是一种有趣的多环呋喃,具有稠合呋喃和茚酮骨架。不幸的是,对其光物理性质的研究有限,这可能是由于缺乏对这些化合物的有效和直接的方法。在此,我们开发了一种钴催化的自由基-极性交叉环化反应,使现成的o-炔基芳基 β-羰基化合物能够提供多种茚并 [1,2- c ] 呋喃。还进行了光物理和 DFT 计算,表明获得的 Indeno[1,2- c]呋喃表现出有前途的电子和光学特性。
Divergent Construction of N‐Doped Polycyclic Aromatic Hydrocarbons with Indole as the Nitrogen Source Building Block
作者:Ming Bao、Xiongda Xie、Jingjing Huang、Michael P. Doyle、Zhi Ren、Haibo Yue、Xinfang Xu
DOI:10.1002/chem.202300140
日期:——
catalyst-dependent divergent cascade reaction of alkyne-embedded diazoketones with indoles is reported, which offers expeditious access to benzo[i]phenanthridines and benzo[b]carbazoles in good yield under mild reaction conditions. N-embedded dienophiles are used rather than alkynes or olefins for cycloaddition with the isobenzopyrylium species, providing a concise and practical approach for the selective
报道了炔烃嵌入的重氮酮与吲哚的金属催化剂依赖性发散级联反应,它提供了在温和的反应条件下以良好的收率快速获得苯并 [ i ] 菲啶和苯并 [ b ] 咔唑。使用嵌氮亲二烯体而不是炔烃或烯烃与异苯并吡喃物种进行环加成,为选择性构建具有结构多样性和广泛官能团相容性的嵌氮多环芳烃 (PAH) 提供了一种简洁实用的方法。