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
Copper-Catalyzed Cascade Cyclization of Arylsulfonylhydrazones Derived from <i>ortho</i>-Alkynyl Arylketones: Regioselective Synthesis of Functionalized Cinnolines
作者:Biao Yao、Tao Miao、Wei Wei、Pinhua Li、Lei Wang
DOI:10.1021/acs.orglett.9b03134
日期:2019.12.6
A novel copper-catalyzed cascade reaction of arylsulfonylhydrazones derived from ortho-alkynyl arylketones was accomplished. This reaction provides concise access to diversified cinnolines in good yields. The mechanistic investigations have disclosed involvement of the key alkynyl amination, 1,4-aryl migration, desulfonylation, and diazo radical cyclization cascade in the transformation.
A rhodium-catalysed Sonogashira-type coupling exploiting C–S functionalisation: orthogonality with palladium-catalysed variants
作者:Milan Arambasic、Manjeet K. Majhail、Robert N. Straker、James D. Neuhaus、Michael C. Willis
DOI:10.1039/c9cc00092e
日期:——
A rhodium(i) catalyst mediates selective and efficient coupling reactions between arylmethylsulfides and terminal alkynes to provide Sonogashira-like products.
Chemo‐ and Regioselective Catalyst‐Controlled Carbocyclization of Alkynyl Ketones: Rapid Synthesis of 1‐Indanones and 1‐Naphthols
作者:Liangliang Song、Guilong Tian、Erik V. Van der Eycken
DOI:10.1002/chem.201901860
日期:2019.6.7
A catalyst‐controlled intramolecular carbocyclization of 2‐alkynyl aryl ketones is presented. Under rhodium(III) catalysis, 1‐indanones are formed through 5‐exo‐dig carbocyclizations with exclusive chemo‐, regio‐ and stereoselectivity. When catalyzed by copper(I), 1‐naphthols are obtained through 6‐endo‐dig carbocyclizations with exclusive chemo‐ and regioselectivity.
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。