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.
Cerium(III) Chloride Heptahydrate (CeCl3 · 7H2O) as an Efficient Enamination Catalyst in Aqueous Media
作者:M. M. Khodaei、A. R. Khosropour、M. Kookhazadeh
DOI:10.1007/s11178-005-0363-z
日期:2005.10
Cerium(III) chloride heptahydrate CeCl3 · H2O catalyzes enamination of β-dicarbonyl compounds with primary amines in aqueous medium at room temperature to afford the corresponding β-enamino ketones with high chemoselectivity.
Enamination of a wide variety of primary amines was successfully described with excellent chemo-selectivity in the presence of catalytic amounts of β-cyclodextrin in water under mild conditions. Aliphatic amines also reacted efficiently to produce the corresponding enaminones.
Enamination of a wide various primary amines was successfully carried out in the presence of catalytic amounts of cerium chloride heptahydrate in ionic liquid and solvent-free conditions as 'green' media under mild reaction conditions.
An Efficient Method for the Enamination of 1,3-Dicarbonyl Compounds with Ceric Ammonium Nitrate (CAN)
作者:Li-Ping Mo、Shu-Fen Liu、Wan-Zhi Li
DOI:10.1002/jccs.200700127
日期:2007.8
An efficient method for the enamination of 1,3-dicarbonylcompounds by employing ceric ammonium nitrate (CAN) as the catalyst has been described. A variety of β-amino-α,β-unsaturated ketones and esters have been synthesized in excellent yield within a short reaction time under solvent-free conditions.