In this paper, a concise, open-vessel synthesis of 1-arylisoquinolines is described via HCl-mediated intermolecular cyclocondensation of oxygenated arylacetic acids with arylaldehydes in the presence of NH2OH and alcoholic solvents under mild and one-pot reaction conditions. A plausible mechanism is proposed and discussed herein. In the overall reaction process, only water was generated as the byproduct
Bsi(OTf)<sub>3</sub>-mediated tandem annulation of 1-aryl isochroman-3-ones with oxygenated arenes: one-pot synthesis of polyoxygenated homotriptycenes
Bi(OTf)3 (bismuth triflate)-mediated one-pot tandem annulation of oxygenated 1-aryl isochroman-3-ones with oxygenated arenes provides polyoxygenated homotriptycenes in moderate to good yields in MeNO2 at reflux (101 °C) for 10 h under an air atmosphere and easy-operational conditions via intermolecular and intramolecular Friedel–Crafts type procedures. A plausible mechanism is proposed and discussed
Trifluoroacetic Anhydride Mediated One-Pot Synthesis of 1-Aryl Isochroman-3-ones via the Carboxy-Pictet–Spengler Reaction
作者:Meng-Yang Chang、Shin-Mei Chen、Yu-Ting Hsiao
DOI:10.1021/acs.joc.9b01605
日期:2019.9.20
In this paper, a novel and open-vessel route for the facile-operational synthesis of 1-aryl isochroman-3-ones is described via (CF3CO)2O (trifluoroaceticanhydride, TFAA)-mediated intermolecular (4 + 2) annulation of oxygenated arylacetic acids with arylaldehydes or ketones under mild reaction conditions. A plausible mechanism is proposed and discussed herein. Various reaction conditions are investigated
One-Pot Access to 4-Aryl-2-arylacetoxynaphthalenes via Benzannulation of Oxygenated Arylacetic Acids and Alkyl Aryl Ketones
作者:Meng-Yang Chang、Shin-Mei Chen、Yu-Ting Hsiao
DOI:10.1055/s-0039-1690799
日期:——
Trifluoroacetic anhydride mediated one-pot intermolecular formal (4+2) benzannulation of oxygenated arylacetic acids with alkylarylketones provides 4-aryl-2-arylacetoxynaphthalenes in moderate to good yields in the presence of H3PO4 in an open-vessel in a straightforward procedure. A plausible mechanism is proposed and discussed. This protocol provides a highly effective ring-closure via two carbon–carbon
三氟乙酸酐介导的含氧芳基乙酸与烷基芳基酮的一锅间分子式(4 + 2)苯甲酸环合反应,在开放容器中在H 3 PO 4存在下,以中等至良好的产率提供了4-芳基-2-芳基乙酰氧基萘。简单明了的程序。提出并讨论了一种可行的机制。该协议通过两个碳-碳(CC)和一个碳-氧(C-O)键形成事件提供了一种高效的闭环方法。