Radical-Triggered Tandem Cyclization of 1,6-Enynes with H<sub>2</sub>O: A Way to Access Strained 1<i>H</i>-Cyclopropa[<i>b</i>]naph thalene-2,7-diones
作者:Limeng Zheng、Bingwei Zhou、Hongwei Jin、Ting Li、Yunkui Liu
DOI:10.1021/acs.orglett.8b03007
日期:2018.11.16
developed herein. Strained 1H-cyclopropa[b]naphthalene-2,7-diones are successfully obtained in moderate to good yields with excellent stereoselectivity. Mechanistic studies reveal a key role of water in generating a hydroxyl radical that initiates a sequential Michaeladdition/ring closure pathway. Importantly, the formed hydroxyl is proposed to be a good leaving group during the cyclopropane ring formation
本文已经开发了自由基引发的1,6-烯炔的串联环化。以中等至良好的产率和优异的立体选择性成功获得了应变的1 H-环丙烷[ b ]萘-2,7-二酮。机理研究揭示了水在产生羟基自由基中的关键作用,该羟基自由基引发了顺序的迈克尔加成/环闭合路径。重要的是,提议的形成的羟基在环丙烷环形成期间是良好的离去基团。
Synthesis of Chrysene Derivatives via Copper-Catalyzed One-Pot Dimerization of 2-Alkynyl-1-acetylbenzenes
作者:Biao Guo、Liyao Zheng、Lichen Yang、Ruimao Hua
DOI:10.1021/jo500182k
日期:2014.5.16
An efficient route for highly substituted chrysenederivatives via operationally simple copper-catalyzed one-pot dimerization of 2-alkynyl-1-acetylbenzenes is described.
CuSO4·5H2O-catalyzed aminobenzannulation of ortho-alkynylaromatic ketones with anilines approach towards 1-aminonaphthalenes
作者:Biao Guo、Ruimao Hua
DOI:10.1016/j.tet.2016.06.036
日期:2016.7
An efficient catalyst system for the aminobenzannulation of ortho-alkynylaromatic ketones with amines affording substituted 1-aminonaphthalene derivatives with high atom-efficiency in the presence of CuSO4·5H2O was developed.
Single Cu(I)-Photosensitizer Enabling Combination of Energy-Transfer and Photoredox Catalysis for the Synthesis of Benzo[<i>b</i>]fluorenols from 1,6-Enynes
作者:Limeng Zheng、Han Xue、Bingwei Zhou、Shu-Ping Luo、Hongwei Jin、Yunkui Liu
DOI:10.1021/acs.orglett.1c01427
日期:2021.6.4
An efficient, mild, and atom-economical synthesis of benzo[b]fluorenols from 1,6-enynes has been developed under photocatalytic conditions. A single P/N heteroleptic Cu(I)-photosensitizer might exhibit both energy-transfer and photoredox catalytic activities in the formation of benzo[b]fluorenols.
已经在光催化条件下开发了一种从 1,6-烯炔有效、温和且原子经济地合成苯并 [ b ] 芴醇的方法。单个 P/N 杂配 Cu(I)-光敏剂可能在苯并 [ b ] 芴醇的形成过程中表现出能量转移和光氧化还原催化活性。