Gold-Catalyzed Intramolecular Allylic Amination of 2-Tosylaminophenylprop-1-en-3-ols. A Concise Synthesis of (±)-Angustureine
作者:Prasath Kothandaraman、Shi Jia Foo、Philip Wai Hong Chan
DOI:10.1021/jo900917q
日期:2009.8.21
ionization of the starting material, which causes intramolecular nucleophilic addition of the sulfonamide unit to the allylic cation moiety and construction of the 1,2-dihydroquinoline. The utility of this N-heterocyclic ring forming strategy as a synthetic tool that makes use of alcohols as pro-electrophiles was exemplified by its application to the synthesis of the bioactive tetrahydroquinoline alkaloid
FeCl<sub>3</sub>·6H<sub>2</sub>O-Catalyzed Intramolecular Allylic Amination: Synthesis of Substituted Dihydroquinolines and Quinolines
作者:Zhiming Wang、Shen Li、Bin Yu、Haibo Wu、Yurong Wang、Xiaoqiang Sun
DOI:10.1021/jo301560w
日期:2012.10.5
efficient method to synthesize 2- or 4-substituted 1,2-dihydroquinolines and quinolines catalyzed by FeCl3·6H2O (2 mol %) was described. The iron-catalyzed intramolecular allylicamination of 2-aminophenyl-1-en-3-ols proceeded smoothly to afford 13 1,2-dihydroquinoline and 8 quinoline derivatives under mild reaction conditions with good to excellent yields (up to 96%).
Iron oxide-silver magnetic nanoparticles as simple heterogeneous catalysts for the direct inter/intramolecular nucleophilic substitution of π-activated alcohols with electron-deficient amines
作者:Xingzhu Xu、Haibo Wu、Zhengyi Li、Xiaoqiang Sun、Zhiming Wang
DOI:10.1016/j.tet.2015.06.028
日期:2015.8
The development of bimetallic iron oxide-silver magnetic nanoparticles (Fe2O3-Ag MNPs) catalytic system provides an efficient heterogeneous synthetic pathway to allylic amines and 1,2-dihydroquinolines involving the direct inter/intramolecular nucleophilic substitution of pi-activated alcohols with electron-deficient amines. The major advantages of the present method are wide substrate scope, simple product separation, low catalyst loading, and magnetically recyclable catalyst. (C) 2015 Elsevier Ltd. All rights reserved.
Brønsted Acid-Catalysed Allylic Amination of 1-(2-Aminoaryl)prop-2-en-1-ols to 1,2-Dihydroquinolines
作者:David Philip Day、Stuart Adam Henry、Yichao Zhao、Jianwen Jin、Guy James Clarkson、Philip Wai Hong Chan
DOI:10.1071/ch18191
日期:——
highly efficient synthetic method to prepare 1,2-dihydroquinolines that relies on trifluoromethanesulfonic acid (TfOH)-catalysed allylicamination of 1-(2-aminoaryl)prop-2-en-1-ols is described. Achieved at a catalyst loading of 0.01 mol-% under mild conditions at room temperature, the reaction was found to be robust, with a wide range of substitution patterns tolerated. The corresponding N-heterocyclic