A General and Efficient Method for the Preparation of β-Enamino Ketones and Esters Catalyzed by Indium Tribromide
作者:Zhan-Hui Zhang、Liang Yin、Yong-Mei Wang
DOI:10.1002/adsc.200505268
日期:2006.1
A variety of β-enaminoketones and esters have been synthesized in high to exellent yields by reacting β-dicarbonyl compounds with amines in the presence of a catalytic amount of indiumtribromide. The reaction proceeds smoothly at room temperature in a short reaction time under solvent-free conditions.
Solvent-free synthesis of β-enamino ketones and esters catalysed by recyclable iron(III) triflate
作者:Cheng-Liang Feng、Ning-Ning Chu、Shu-Guang Zhang、Jin Cai、Jun-Qing Chen、Hua-You Hu、Min Ji
DOI:10.2478/s11696-014-0544-8
日期:2014.1.1
A novel application of highly stable Fe(OTf)3 as an efficient catalyst for the synthesis of a variety of β-enaminoketones and esters under solvent-free conditions is described. Notably, this protocol of a “green synthesis”, which produced β-enaminoketones and esters by the reaction of a variety of β-dicarbonyl compounds and primary amines, exhibits attractive properties including high yields, short
Silica supported Fe(HSO4)3 as an efficient, heterogeneous and recyclable catalyst for synthesis of β-enaminones and β-enamino esters
作者:Hossein Eshghi、Seyed Mohammad Seyedi、Elham Safaei、Mohammad Vakili、Abolghasem Farhadipour、Mohtaram Bayat-Mokhtari
DOI:10.1016/j.molcata.2012.07.021
日期:2012.11
the one-pot reaction of β-dicarbonyl compounds with various amines in the presence of silica ferric hydrogensulfate under solvent free conditions at room temperature. The reactions proceed smoothly in excellent yield, high chemoselectivity and with an easy work-up. Catalytic amount of Fe(HSO4)3·SiO2 catalyzed one-pot reaction of linear and cyclic β-diketones and β-ketoesters with aromatic and aliphatic
Ca(CF3COO)2: An efficient Lewis acid catalyst for chemo- and regio-selective enamination of β-dicarbonyl compounds
作者:Mohamed Anoir Harrad、Rachid Outtouch、Mustapha Ait Ali、Larbi El Firdoussi、Abdallah Karim、Alain Roucoux
DOI:10.1016/j.catcom.2009.11.019
日期:2010.1
A relevant procedure has been developed for the synthesis of β-enaminoesters catalysed by Ca(CF3COO)2. The reaction of β-ketoesters with primary amines was efficiently carried out under solvent-free conditions at room temperature and led to chemo- and regio-selective formations of enamine derivatives in high yields.
Catalytic Asymmetric Five-Component Tandem Reaction: Diastereo- and Enantioselective Synthesis of Densely Functionalized Tetrahydropyridines with Biological Importance
作者:Feng Shi、Wei Tan、Ren-Yi Zhu、Gui-Juan Xing、Shu-Jiang Tu
DOI:10.1002/adsc.201300001
日期:2013.5.17
aldehydes and anilines have been established in the presence of a chiral phosphoric acid, affording densely functionalized tetrahydropyridines with concomitant generation of five σ bonds and two stereogenic centers in high diastereo‐ and enantioselectivities (up to >99:1 dr, 95:5 er). In addition, the first isolation and preparation of a diene species as the key intermediate of the reaction has been