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
Radical Cascade Bicyclization/Aromatization of 1,7‐Enynes with 1,3‐Dicarbonyl Compounds towards 2,3‐Dihydro‐1
<i>H</i>
‐cyclopenta[
<i>a</i>
]naphthalenes
An Ag-catalyzed radical cascade bicyclization/aromatization of C-linked 1,7-enynes with 1,3-dicarbonyls has been achieved, providing a step- and atom-economy approach for the construction of 2,3-dihydro-1H-cyclopenta[a]naphthalenes, an important structural scaffold existed in biologically active compounds. From this transformation, structurally diverse 2,3-dihydro-1H-cyclopenta[a]naphthalenes were
已经实现了银催化自由基级联双环化/芳构化的C-连接的 1,7-烯炔与 1,3-二羰基,为构建 2,3-二氢-1 H-提供了一步和原子经济的方法-环戊二烯[ a ]萘,一种重要的结构支架,存在于生物活性化合物中。通过这种转化,以中等至良好的产率和高区域选择性获得了结构多样的 2,3-二氢-1 H-环戊二烯 [ a ] 萘。此外,还举例说明了进一步的产品衍生化。
Modular synthesis of 3-substituted isocoumarins <i>via</i> silver-catalyzed aerobic oxidation/<i>6-endo</i> heterocyclization of <i>ortho</i>-alkynylbenzaldehydes
作者:Hao Wu、Yi-Chun Wang、Andrey Shatskiy、Qiu-Yan Li、Jian-Quan Liu、Markus D. Kärkäs、Xiang-Shan Wang
DOI:10.1039/d1ob01065d
日期:——
A method involving silver-catalyzed aerobic oxidation/6-endo heterocyclization of ortho-alkynylbenzaldehydes to yield 3-substituted isocoumarins is described. The developed protocol allows convenient access to a range of synthetically useful 3-substituted isocoumarins and related fused heterocyclolactones in good to high yields, using silver tetrafluoroborate as the catalyst, and atmospheric oxygen