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.