A novel enamination of β-dicarbonyl compounds catalyzed by Bi(TFA)<sub>3</sub> immobilized on molten TBAB
作者:Mohammad M Khodaei、Ahmad R Khosropour、Mehdi Kookhazadeh
DOI:10.1139/v05-021
日期:2005.3.1
Enamination of a wide variety of primary amines was successfully carried out in the presence of catalytic amounts of bismuth(III) trifluoroacetate immobilized on molten tetrabutylammonium bromide as "green" media under mild conditions. This new system of the catalyst is recyclable and reusable. Generally, the results of the reaction in tetrabutylammonium bromide is better than the previously obtained
A mild method for the synthesis of β-enaminones and β-enamino esters using KH<sub>2</sub>PO<sub>4</sub> as catalyst
作者:Feng Xu、Hong-Xia Lv、Jin-Ping Wang、You-Ping Tian、Jian-Jun Wang
DOI:10.3184/030823408x382117
日期:2008.12
β-Enaminones and β-enamino esters have been produced by the direct condensation of amines with β-diketones and β-ketoesters using KH2PO4 as catalyst under mild, solvent-free conditions.
An Easy Synthesis of Enaminones in Water as Solvent
作者:Hélio A. Stefani、Iguatemi M. Costa、Diogo de O. Silva
DOI:10.1055/s-2000-7608
日期:——
Enaminones were prepared from β-ketoesters or 1,3-diketones and primary amines in water als solvent.
烯丙酮是由δ-酮或 1,3-二酮和伯胺在水溶剂中制备而成。
A mild, efficient and environmentally friendly method for the regio- and chemoselective synthesis of enaminones using Bi(TFA)3 as a reusable catalyst in aqueous media
作者:Ahmad R. Khosropour、Mohammad M. Khodaei、Mehdi Kookhazadeh
DOI:10.1016/j.tetlet.2003.12.093
日期:2004.2
Bismuth(III) trifluoroacetate has been found to be an extremely efficient catalyst for the preparation of beta-enaminones in water. In addition, by employing this catalyst, high regio- and chemoselective enamination of carbonyl compounds was achieved. (C) 2004 Elsevier Ltd. All rights reserved.
Highly efficient microwave-accelerated preparation of β-ketoimines
作者:Dong Hwan Lee、Sang-Eon Park、Kyuho Cho、Younsoo Kim、Taimur Athar、Ik-Mo Lee
DOI:10.1016/j.tetlet.2007.09.143
日期:2007.11
We present here a new and efficient methodology for the beta-ketoimine ligand with microwave heating system. The new method showed faster reaction rates, higher yields, and selectivities of the desired compounds in the absence of solvents. (C) 2007 Elsevier Ltd. All rights reserved.